89991506 has 32 divisors (see below), whose sum is σ = 158163840. Its totient is φ = 37945600.

The previous prime is 89991497. The next prime is 89991521. The reversal of 89991506 is 60519998.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 24860 + ... + 28248.

It is an arithmetic number, because the mean of its divisors is an integer number (4942620).

Almost surely, 2^89991506 is an apocalyptic number.

89991506 is a deficient number, since it is larger than the sum of its proper divisors (68172334).

89991506 is a wasteful number, since it uses less digits than its factorization.

89991506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3490.

The product of its (nonzero) digits is 174960, while the sum is 47.

The square root of 89991506 is about 9486.3852968346. The cubic root of 89991506 is about 448.1263760448.

The spelling of 89991506 in words is "eighty-nine million, nine hundred ninety-one thousand, five hundred six".