90488997 has 6 divisors (see below), whose sum is σ = 130706342. Its totient is φ = 60325992.

The previous prime is 90488987. The next prime is 90489023. The reversal of 90488997 is 79988409.

It can be written as a sum of positive squares in only one way, i.e., 81162081 + 9326916 = 9009^2 + 3054^2 .

It is not a de Polignac number, because 90488997 - 2⁶ = 90488933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90488987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5027158 + ... + 5027175.

Almost surely, 2^90488997 is an apocalyptic number.

It is an amenable number.

90488997 is a deficient number, since it is larger than the sum of its proper divisors (40217345).

90488997 is a wasteful number, since it uses less digits than its factorization.

90488997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10054339 (or 10054336 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 90488997 is about 9512.5704728007. The cubic root of 90488997 is about 448.9506363523.

The spelling of 90488997 in words is "ninety million, four hundred eighty-eight thousand, nine hundred ninety-seven".