97787939823 has 32 divisors (see below), whose sum is σ = 169605112320. Its totient is φ = 54515920320.

The previous prime is 97787939803. The next prime is 97787939839. The reversal of 97787939823 is 32893978779.

It is not a de Polignac number, because 97787939823 - 2⁵ = 97787939791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97787939803) 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, 6301965 + ... + 6317462.

It is an arithmetic number, because the mean of its divisors is an integer number (5300159760).

Almost surely, 2^97787939823 is an apocalyptic number.

97787939823 is a deficient number, since it is larger than the sum of its proper divisors (71817172497).

97787939823 is a wasteful number, since it uses less digits than its factorization.

97787939823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12619484 (or 12619478 counting only the distinct ones).

The product of its digits is 288054144, while the sum is 72.

The spelling of 97787939823 in words is "ninety-seven billion, seven hundred eighty-seven million, nine hundred thirty-nine thousand, eight hundred twenty-three".