[go: up one dir, main page]

Search a number
-
+
31019117 is a prime number
BaseRepresentation
bin111011001010…
…1000001101101
32011100221020012
41312111001231
530420102432
63024503005
7524441513
oct166250155
964327205
1031019117
1116567138
12a47aa65
136570b0c
1441964b3
152acacb2
hex1d9506d

31019117 has 2 divisors, whose sum is σ = 31019118. Its totient is φ = 31019116.

The previous prime is 31019099. The next prime is 31019123. The reversal of 31019117 is 71191013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18267076 + 12752041 = 4274^2 + 3571^2 .

It is an emirp because it is prime and its reverse (71191013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31019117 - 214 = 31002733 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 31019092 and 31019101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31019137) 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, 15509558 + 15509559.

It is an arithmetic number, because the mean of its divisors is an integer number (15509559).

Almost surely, 231019117 is an apocalyptic number.

It is an amenable number.

31019117 is a deficient number, since it is larger than the sum of its proper divisors (1).

31019117 is an equidigital number, since it uses as much as digits as its factorization.

31019117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189, while the sum is 23.

The square root of 31019117 is about 5569.4808555197. The cubic root of 31019117 is about 314.2026259204.

The spelling of 31019117 in words is "thirty-one million, nineteen thousand, one hundred seventeen".