799999999897 has 16 divisors (see below), whose sum is σ = 946914076800. Its totient is φ = 661298077440.

The previous prime is 799999999889. The next prime is 799999999991. The reversal of 799999999897 is 798999999997.

It is not a de Polignac number, because 799999999897 - 2³ = 799999999889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 799999999796 and 799999999805.

It is not an unprimeable number, because it can be changed into a prime (799999999867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2119504 + ... + 2468257.

It is an arithmetic number, because the mean of its divisors is an integer number (59182129800).

Almost surely, 2^799999999897 is an apocalyptic number.

It is an amenable number.

799999999897 is a deficient number, since it is larger than the sum of its proper divisors (146914076903).

799999999897 is a wasteful number, since it uses less digits than its factorization.

799999999897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4588656.

The product of its digits is 151868831688, while the sum is 103.

The spelling of 799999999897 in words is "seven hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred ninety-seven".