90556457 has 2 divisors, whose sum is σ = 90556458. Its totient is φ = 90556456.

The previous prime is 90556421. The next prime is 90556471. The reversal of 90556457 is 75465509.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79138816 + 11417641 = 8896^2 + 3379^2 .

It is a cyclic number.

It is not a de Polignac number, because 90556457 - 2⁶ = 90556393 is a prime.

It is not a weakly prime, because it can be changed into another prime (90556157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45278228 + 45278229.

It is an arithmetic number, because the mean of its divisors is an integer number (45278229).

Almost surely, 2^90556457 is an apocalyptic number.

It is an amenable number.

90556457 is a deficient number, since it is larger than the sum of its proper divisors (1).

90556457 is an equidigital number, since it uses as much as digits as its factorization.

90556457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 189000, while the sum is 41.

The square root of 90556457 is about 9516.1156466281. The cubic root of 90556457 is about 449.0621736216.

The spelling of 90556457 in words is "ninety million, five hundred fifty-six thousand, four hundred fifty-seven".