90757291 has 2 divisors, whose sum is σ = 90757292. Its totient is φ = 90757290.

The previous prime is 90757229. The next prime is 90757297. The reversal of 90757291 is 19275709.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90757291 - 2¹¹ = 90755243 is a prime.

It is not a weakly prime, because it can be changed into another prime (90757297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45378645 + 45378646.

It is an arithmetic number, because the mean of its divisors is an integer number (45378646).

Almost surely, 2^90757291 is an apocalyptic number.

90757291 is a deficient number, since it is larger than the sum of its proper divisors (1).

90757291 is an equidigital number, since it uses as much as digits as its factorization.

90757291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39690, while the sum is 40.

The square root of 90757291 is about 9526.6621121986. The cubic root of 90757291 is about 449.3939017173.

The spelling of 90757291 in words is "ninety million, seven hundred fifty-seven thousand, two hundred ninety-one".