90515889 has 12 divisors (see below), whose sum is σ = 131946100. Its totient is φ = 59789664.

The previous prime is 90515869. The next prime is 90515911. The reversal of 90515889 is 98851509.

It can be written as a sum of positive squares in 2 ways, for example, as 29160000 + 61355889 = 5400^2 + 7833^2 .

It is not a de Polignac number, because 90515889 - 2⁹ = 90515377 is a prime.

It is a super-2 number, since 2×90515889² = 16386252322920642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90515809) 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 in 11 ways as a sum of consecutive naturals, for example, 45154 + ... + 47115.

Almost surely, 2^90515889 is an apocalyptic number.

It is an amenable number.

90515889 is a deficient number, since it is larger than the sum of its proper divisors (41430211).

90515889 is a wasteful number, since it uses less digits than its factorization.

90515889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92384 (or 92381 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 45.

The square root of 90515889 is about 9513.9838658682. The cubic root of 90515889 is about 448.9951057910.

The spelling of 90515889 in words is "ninety million, five hundred fifteen thousand, eight hundred eighty-nine".