69397710921 has 72 divisors (see below), whose sum is σ = 126006753600. Its totient is φ = 36026717760.

The previous prime is 69397710883. The next prime is 69397710953. The reversal of 69397710921 is 12901779396.

It is a happy number.

It is not a de Polignac number, because 69397710921 - 2²³ = 69389322313 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (69397710961) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 20572791 + ... + 20576163.

It is an arithmetic number, because the mean of its divisors is an integer number (1750093800).

Almost surely, 2^69397710921 is an apocalyptic number.

It is an amenable number.

69397710921 is a deficient number, since it is larger than the sum of its proper divisors (56609042679).

69397710921 is a wasteful number, since it uses less digits than its factorization.

69397710921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6107 (or 6093 counting only the distinct ones).

The product of its (nonzero) digits is 1285956, while the sum is 54.

The spelling of 69397710921 in words is "sixty-nine billion, three hundred ninety-seven million, seven hundred ten thousand, nine hundred twenty-one".