92788721 has 2 divisors, whose sum is σ = 92788722. Its totient is φ = 92788720.

The previous prime is 92788691. The next prime is 92788733. The reversal of 92788721 is 12788729.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85840225 + 6948496 = 9265^2 + 2636^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-92788721 is a prime.

It is not a weakly prime, because it can be changed into another prime (92788121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46394360 + 46394361.

It is an arithmetic number, because the mean of its divisors is an integer number (46394361).

Almost surely, 2^92788721 is an apocalyptic number.

It is an amenable number.

92788721 is a deficient number, since it is larger than the sum of its proper divisors (1).

92788721 is an equidigital number, since it uses as much as digits as its factorization.

92788721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 44.

The square root of 92788721 is about 9632.6902265151. The cubic root of 92788721 is about 452.7221354730.

The spelling of 92788721 in words is "ninety-two million, seven hundred eighty-eight thousand, seven hundred twenty-one".