92812721 has 2 divisors, whose sum is σ = 92812722. Its totient is φ = 92812720.

The previous prime is 92812703. The next prime is 92812747. The reversal of 92812721 is 12721829.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91680625 + 1132096 = 9575^2 + 1064^2 .

It is a cyclic number.

It is not a de Polignac number, because 92812721 - 2¹⁴ = 92796337 is a prime.

It is a super-2 number, since 2×92812721² = 17228402358847682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (92812771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46406360 + 46406361.

It is an arithmetic number, because the mean of its divisors is an integer number (46406361).

Almost surely, 2^92812721 is an apocalyptic number.

It is an amenable number.

92812721 is a deficient number, since it is larger than the sum of its proper divisors (1).

92812721 is an equidigital number, since it uses as much as digits as its factorization.

92812721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 32.

The square root of 92812721 is about 9633.9359038765. The cubic root of 92812721 is about 452.7611646226.

The spelling of 92812721 in words is "ninety-two million, eight hundred twelve thousand, seven hundred twenty-one".