90897599 has 16 divisors (see below), whose sum is σ = 99489600. Its totient is φ = 82548480.

The previous prime is 90897593. The next prime is 90897601. The reversal of 90897599 is 99579809.

It is a cyclic number.

It is not a de Polignac number, because 90897599 - 2¹² = 90893503 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 (90897593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 323339 + ... + 323619.

It is an arithmetic number, because the mean of its divisors is an integer number (6218100).

Almost surely, 2^90897599 is an apocalyptic number.

90897599 is a deficient number, since it is larger than the sum of its proper divisors (8592001).

90897599 is a wasteful number, since it uses less digits than its factorization.

90897599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610.

The product of its (nonzero) digits is 1837080, while the sum is 56.

The square root of 90897599 is about 9534.0232326128. The cubic root of 90897599 is about 449.6253655618.

The spelling of 90897599 in words is "ninety million, eight hundred ninety-seven thousand, five hundred ninety-nine".