39913859 has 2 divisors, whose sum is σ = 39913860. Its totient is φ = 39913858.

The previous prime is 39913849. The next prime is 39913871. The reversal of 39913859 is 95831993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39913859 - 2¹² = 39909763 is a prime.

It is a super-2 number, since 2×39913859² = 3186232280543762, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (39913829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19956929 + 19956930.

It is an arithmetic number, because the mean of its divisors is an integer number (19956930).

Almost surely, 2^39913859 is an apocalyptic number.

39913859 is a deficient number, since it is larger than the sum of its proper divisors (1).

39913859 is an equidigital number, since it uses as much as digits as its factorization.

39913859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 262440, while the sum is 47.

The square root of 39913859 is about 6317.7416059855. The cubic root of 39913859 is about 341.7495144985.

The spelling of 39913859 in words is "thirty-nine million, nine hundred thirteen thousand, eight hundred fifty-nine".