99590581 has 4 divisors (see below), whose sum is σ = 100307200. Its totient is φ = 98873964.

The previous prime is 99590527. The next prime is 99590591. The reversal of 99590581 is 18509599.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99590581 - 2¹⁵ = 99557813 is a prime.

It is a super-2 number, since 2×99590581² = 19836567647835122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99590501) 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, 358101 + ... + 358378.

It is an arithmetic number, because the mean of its divisors is an integer number (25076800).

Almost surely, 2^99590581 is an apocalyptic number.

It is an amenable number.

99590581 is a deficient number, since it is larger than the sum of its proper divisors (716619).

99590581 is a wasteful number, since it uses less digits than its factorization.

99590581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716618.

The product of its (nonzero) digits is 145800, while the sum is 46.

The square root of 99590581 is about 9979.5080540075. The cubic root of 99590581 is about 463.5245653463.

The spelling of 99590581 in words is "ninety-nine million, five hundred ninety thousand, five hundred eighty-one".