90459557 has 2 divisors, whose sum is σ = 90459558. Its totient is φ = 90459556.

The previous prime is 90459553. The next prime is 90459563. The reversal of 90459557 is 75595409.

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., 74666881 + 15792676 = 8641^2 + 3974^2 .

It is a cyclic number.

It is not a de Polignac number, because 90459557 - 2² = 90459553 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90459553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45229778 + 45229779.

It is an arithmetic number, because the mean of its divisors is an integer number (45229779).

Almost surely, 2^90459557 is an apocalyptic number.

It is an amenable number.

90459557 is a deficient number, since it is larger than the sum of its proper divisors (1).

90459557 is an equidigital number, since it uses as much as digits as its factorization.

90459557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 283500, while the sum is 44.

The square root of 90459557 is about 9511.0229208009. The cubic root of 90459557 is about 448.9019433591.

The spelling of 90459557 in words is "ninety million, four hundred fifty-nine thousand, five hundred fifty-seven".