92640821 has 12 divisors (see below), whose sum is σ = 116056332. Its totient is φ = 73297728.

The previous prime is 92640817. The next prime is 92640829. The reversal of 92640821 is 12804629.

It can be written as a sum of positive squares in 2 ways, for example, as 13608721 + 79032100 = 3689^2 + 8890^2 .

It is not a de Polignac number, because 92640821 - 2² = 92640817 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (92640829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72080 + ... + 73353.

It is an arithmetic number, because the mean of its divisors is an integer number (9671361).

Almost surely, 2^92640821 is an apocalyptic number.

92640821 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

92640821 is a deficient number, since it is larger than the sum of its proper divisors (23415511).

92640821 is a wasteful number, since it uses less digits than its factorization.

92640821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145460 (or 145453 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 92640821 is about 9625.0101818128. The cubic root of 92640821 is about 452.4814696888.

The spelling of 92640821 in words is "ninety-two million, six hundred forty thousand, eight hundred twenty-one".