39887913 has 24 divisors (see below), whose sum is σ = 58645888. Its totient is φ = 23972256.

The previous prime is 39887909. The next prime is 39887921. The reversal of 39887913 is 31978893.

It is not a de Polignac number, because 39887913 - 2² = 39887909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (39887923) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85920 + ... + 86382.

Almost surely, 2^39887913 is an apocalyptic number.

It is an amenable number.

39887913 is a deficient number, since it is larger than the sum of its proper divisors (18757975).

39887913 is a wasteful number, since it uses less digits than its factorization.

39887913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573 (or 526 counting only the distinct ones).

The product of its digits is 326592, while the sum is 48.

The square root of 39887913 is about 6315.6878485245. The cubic root of 39887913 is about 341.6754470346.

The spelling of 39887913 in words is "thirty-nine million, eight hundred eighty-seven thousand, nine hundred thirteen".