79839199993 has 32 divisors (see below), whose sum is σ = 97352236800. Its totient is φ = 63915540480.

The previous prime is 79839199991. The next prime is 79839200011. The reversal of 79839199993 is 39999193897.

It is a cyclic number.

It is not a de Polignac number, because 79839199993 - 2¹ = 79839199991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79839199991) 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, 37464538 + ... + 37466668.

It is an arithmetic number, because the mean of its divisors is an integer number (3042257400).

Almost surely, 2^79839199993 is an apocalyptic number.

It is an amenable number.

79839199993 is a deficient number, since it is larger than the sum of its proper divisors (17513036807).

79839199993 is a wasteful number, since it uses less digits than its factorization.

79839199993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4417.

The product of its digits is 267846264, while the sum is 76.

The spelling of 79839199993 in words is "seventy-nine billion, eight hundred thirty-nine million, one hundred ninety-nine thousand, nine hundred ninety-three".