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39955031 is a prime number
BaseRepresentation
bin1001100001101…
…0101001010111
32210011220222222
42120122221113
540212030111
63544212555
7663416654
oct230325127
983156888
1039955031
112060a896
121146a15b
13837c23c
145440c2b
1537937db
hex261aa57

39955031 has 2 divisors, whose sum is σ = 39955032. Its totient is φ = 39955030.

The previous prime is 39954989. The next prime is 39955051. The reversal of 39955031 is 13055993.

39955031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (13055993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39955031 - 210 = 39954007 is a prime.

It is a super-2 number, since 2×399550312 = 3192809004421922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 39954982 and 39955000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39955051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19977515 + 19977516.

It is an arithmetic number, because the mean of its divisors is an integer number (19977516).

Almost surely, 239955031 is an apocalyptic number.

39955031 is a deficient number, since it is larger than the sum of its proper divisors (1).

39955031 is an equidigital number, since it uses as much as digits as its factorization.

39955031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18225, while the sum is 35.

The square root of 39955031 is about 6320.9992089859. Note that the first 3 decimals coincide. The cubic root of 39955031 is about 341.8669814312.

The spelling of 39955031 in words is "thirty-nine million, nine hundred fifty-five thousand, thirty-one".