92070721 has 2 divisors, whose sum is σ = 92070722. Its totient is φ = 92070720.

The previous prime is 92070709. The next prime is 92070743. The reversal of 92070721 is 12707029.

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., 91470096 + 600625 = 9564^2 + 775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-92070721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 92070721.

It is not a weakly prime, because it can be changed into another prime (92070701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46035360 + 46035361.

It is an arithmetic number, because the mean of its divisors is an integer number (46035361).

Almost surely, 2^92070721 is an apocalyptic number.

It is an amenable number.

92070721 is a deficient number, since it is larger than the sum of its proper divisors (1).

92070721 is an equidigital number, since it uses as much as digits as its factorization.

92070721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 92070721 is about 9595.3489253909. The cubic root of 92070721 is about 451.5513877870.

It can be divided in two parts, 9 and 2070721, that multiplied together give a square (18636489 = 4317²).

The spelling of 92070721 in words is "ninety-two million, seventy thousand, seven hundred twenty-one".