90459617 has 2 divisors, whose sum is σ = 90459618. Its totient is φ = 90459616.

The previous prime is 90459599. The next prime is 90459623. The reversal of 90459617 is 71695409.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77721856 + 12737761 = 8816^2 + 3569^2 .

It is a cyclic number.

It is not a de Polignac number, because 90459617 - 2⁶ = 90459553 is a prime.

It is not a weakly prime, because it can be changed into another prime (90459697) 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, 45229808 + 45229809.

It is an arithmetic number, because the mean of its divisors is an integer number (45229809).

Almost surely, 2^90459617 is an apocalyptic number.

It is an amenable number.

90459617 is a deficient number, since it is larger than the sum of its proper divisors (1).

90459617 is an equidigital number, since it uses as much as digits as its factorization.

90459617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 90459617 is about 9511.0260750352. The cubic root of 90459617 is about 448.9020426083.

The spelling of 90459617 in words is "ninety million, four hundred fifty-nine thousand, six hundred seventeen".