39999457 has 2 divisors, whose sum is σ = 39999458. Its totient is φ = 39999456.

The previous prime is 39999451. The next prime is 39999467. The reversal of 39999457 is 75499993.

39999457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39929761 + 69696 = 6319^2 + 264^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39999457 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 39999398 and 39999407.

It is not a weakly prime, because it can be changed into another prime (39999451) 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, 19999728 + 19999729.

It is an arithmetic number, because the mean of its divisors is an integer number (19999729).

Almost surely, 2^39999457 is an apocalyptic number.

It is an amenable number.

39999457 is a deficient number, since it is larger than the sum of its proper divisors (1).

39999457 is an equidigital number, since it uses as much as digits as its factorization.

39999457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2755620, while the sum is 55.

The square root of 39999457 is about 6324.5123922718. The cubic root of 39999457 is about 341.9936418001.

It can be divided in two parts, 3999 and 9457, that added together give a square (13456 = 116²).

The spelling of 39999457 in words is "thirty-nine million, nine hundred ninety-nine thousand, four hundred fifty-seven".