79998000013 has 8 divisors (see below), whose sum is σ = 80090695800. Its totient is φ = 79905343488.

The previous prime is 79998000001. The next prime is 79998000023. The reversal of 79998000013 is 31000089997.

79998000013 = 199997² + 199998².

It can be written as a sum of positive squares in 4 ways, for example, as 9201030084 + 70796969929 = 95922^2 + 266077^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79998000013 - 2²⁵ = 79964445581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79998000023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6169545 + ... + 6182497.

It is an arithmetic number, because the mean of its divisors is an integer number (10011336975).

Almost surely, 2^79998000013 is an apocalyptic number.

79998000013 is the 199998-th centered square number.

It is an amenable number.

79998000013 is a deficient number, since it is larger than the sum of its proper divisors (92695787).

79998000013 is a wasteful number, since it uses less digits than its factorization.

79998000013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19631.

The product of its (nonzero) digits is 122472, while the sum is 46.

The spelling of 79998000013 in words is "seventy-nine billion, nine hundred ninety-eight million, thirteen", and thus it is an aban number.