39999000007 has 4 divisors (see below), whose sum is σ = 39999401680. Its totient is φ = 39998598336.

The previous prime is 39998999993. The next prime is 39999000073. The reversal of 39999000007 is 70000099993.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 70000099993 = 1021 ⋅68560333.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39999000007 is a prime.

It is the 199998-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39999000707) by changing a digit.

It is a nontrivial repunit in base 199997.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72919 + ... + 292087.

It is an arithmetic number, because the mean of its divisors is an integer number (9999850420).

Almost surely, 2^39999000007 is an apocalyptic number.

39999000007 is a deficient number, since it is larger than the sum of its proper divisors (401673).

39999000007 is a wasteful number, since it uses less digits than its factorization.

39999000007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401672.

The product of its (nonzero) digits is 137781, while the sum is 46.

The spelling of 39999000007 in words is "thirty-nine billion, nine hundred ninety-nine million, seven", and thus it is an aban number.