89908661 has 4 divisors (see below), whose sum is σ = 89955552. Its totient is φ = 89861772.

The previous prime is 89908639. The next prime is 89908667. The reversal of 89908661 is 16680998.

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 89908661 - 2²⁶ = 22799797 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 (89908667) 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, 20441 + ... + 24446.

It is an arithmetic number, because the mean of its divisors is an integer number (22488888).

Almost surely, 2^89908661 is an apocalyptic number.

It is an amenable number.

89908661 is a deficient number, since it is larger than the sum of its proper divisors (46891).

89908661 is a wasteful number, since it uses less digits than its factorization.

89908661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46890.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 89908661 is about 9482.0177704959. The cubic root of 89908661 is about 447.9888207377.

The spelling of 89908661 in words is "eighty-nine million, nine hundred eight thousand, six hundred sixty-one".