999997999907 has 32 divisors (see below), whose sum is σ = 1089534910464. Its totient is φ = 915032448000.

The previous prime is 999997999837. The next prime is 999997999919. The reversal of 999997999907 is 709999799999.

It is a cyclic number.

It is not a de Polignac number, because 999997999907 - 2³⁶ = 931278523171 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 999997999907.

It is not an unprimeable number, because it can be changed into a prime (999997995907) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61337657 + ... + 61353957.

It is an arithmetic number, because the mean of its divisors is an integer number (34047965952).

Almost surely, 2^999997999907 is an apocalyptic number.

999997999907 is a gapful number since it is divisible by the number (97) formed by its first and last digit.

999997999907 is a deficient number, since it is larger than the sum of its proper divisors (89536910557).

999997999907 is a wasteful number, since it uses less digits than its factorization.

999997999907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17339.

The product of its (nonzero) digits is 18983603961, while the sum is 95.

The spelling of 999997999907 in words is "nine hundred ninety-nine billion, nine hundred ninety-seven million, nine hundred ninety-nine thousand, nine hundred seven".