39923913 has 16 divisors (see below), whose sum is σ = 54190080. Its totient is φ = 26140944.

The previous prime is 39923881. The next prime is 39923927. The reversal of 39923913 is 31932993.

It is not a de Polignac number, because 39923913 - 2⁵ = 39923881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39923963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55168 + ... + 55886.

It is an arithmetic number, because the mean of its divisors is an integer number (3386880).

Almost surely, 2^39923913 is an apocalyptic number.

It is an amenable number.

39923913 is a deficient number, since it is larger than the sum of its proper divisors (14266167).

39923913 is a wasteful number, since it uses less digits than its factorization.

39923913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028.

The product of its digits is 39366, while the sum is 39.

The square root of 39923913 is about 6318.5372516113. The cubic root of 39923913 is about 341.7782067978.

The spelling of 39923913 in words is "thirty-nine million, nine hundred twenty-three thousand, nine hundred thirteen".