92787861321 has 9 divisors (see below), whose sum is σ = 134028230791. Its totient is φ = 61857964992.

The previous prime is 92787861301. The next prime is 92787861323. The reversal of 92787861321 is 12316878729.

It is a happy number.

The square root of 92787861321 is 304611.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 86744975625 + 6042885696 = 294525^2 + 77736^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 92787861321 - 2²⁵ = 92754306889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (92787861323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 863065 + ... + 964601.

Almost surely, 2^92787861321 is an apocalyptic number.

92787861321 is the 304611-st square number.

92787861321 is the 152306-th centered octagonal number.

It is an amenable number.

92787861321 is a deficient number, since it is larger than the sum of its proper divisors (41240369470).

92787861321 is an frugal number, since it uses more digits than its factorization.

92787861321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203080 (or 101540 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The spelling of 92787861321 in words is "ninety-two billion, seven hundred eighty-seven million, eight hundred sixty-one thousand, three hundred twenty-one".