90525599 has 4 divisors (see below), whose sum is σ = 90546936. Its totient is φ = 90504264.

The previous prime is 90525587. The next prime is 90525607. The reversal of 90525599 is 99552509.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90525599 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 (90522599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1904 + ... + 13589.

It is an arithmetic number, because the mean of its divisors is an integer number (22636734).

Almost surely, 2^90525599 is an apocalyptic number.

90525599 is a deficient number, since it is larger than the sum of its proper divisors (21337).

90525599 is a wasteful number, since it uses less digits than its factorization.

90525599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21336.

The product of its (nonzero) digits is 182250, while the sum is 44.

The square root of 90525599 is about 9514.4941536584. The cubic root of 90525599 is about 449.0111603815.

The spelling of 90525599 in words is "ninety million, five hundred twenty-five thousand, five hundred ninety-nine".