813928627897 has 16 divisors (see below), whose sum is σ = 1015145235072. Its totient is φ = 633994427520.

The previous prime is 813928627891. The next prime is 813928627957. The reversal of 813928627897 is 798726829318.

It is a cyclic number.

It is not a de Polignac number, because 813928627897 - 2⁷ = 813928627769 is a prime.

It is a super-2 number, since 2×813928627897² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (813928627891) 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, 1755228 + ... + 2169949.

It is an arithmetic number, because the mean of its divisors is an integer number (63446577192).

Almost surely, 2^813928627897 is an apocalyptic number.

It is an amenable number.

813928627897 is a deficient number, since it is larger than the sum of its proper divisors (201216607175).

813928627897 is a wasteful number, since it uses less digits than its factorization.

813928627897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3927888.

The product of its digits is 146313216, while the sum is 70.

The spelling of 813928627897 in words is "eight hundred thirteen billion, nine hundred twenty-eight million, six hundred twenty-seven thousand, eight hundred ninety-seven".