92720657 has 2 divisors, whose sum is σ = 92720658. Its totient is φ = 92720656.

The previous prime is 92720623. The next prime is 92720701. The reversal of 92720657 is 75602729.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89038096 + 3682561 = 9436^2 + 1919^2 .

It is a cyclic number.

It is not a de Polignac number, because 92720657 - 2⁸ = 92720401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 92720657.

It is not a weakly prime, because it can be changed into another prime (92020657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46360328 + 46360329.

It is an arithmetic number, because the mean of its divisors is an integer number (46360329).

Almost surely, 2^92720657 is an apocalyptic number.

It is an amenable number.

92720657 is a deficient number, since it is larger than the sum of its proper divisors (1).

92720657 is an equidigital number, since it uses as much as digits as its factorization.

92720657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 92720657 is about 9629.1566089663. The cubic root of 92720657 is about 452.6114121847.

The spelling of 92720657 in words is "ninety-two million, seven hundred twenty thousand, six hundred fifty-seven".