89972991 has 16 divisors (see below), whose sum is σ = 133440000. Its totient is φ = 59916024.

The previous prime is 89972989. The next prime is 89973001. The reversal of 89972991 is 19927998.

It is not a de Polignac number, because 89972991 - 2¹ = 89972989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89972191) 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 15 ways as a sum of consecutive naturals, for example, 44010 + ... + 46008.

It is an arithmetic number, because the mean of its divisors is an integer number (8340000).

Almost surely, 2^89972991 is an apocalyptic number.

89972991 is a deficient number, since it is larger than the sum of its proper divisors (43467009).

89972991 is a wasteful number, since it uses less digits than its factorization.

89972991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3675 (or 3669 counting only the distinct ones).

The product of its digits is 734832, while the sum is 54.

The square root of 89972991 is about 9485.4093744024. The cubic root of 89972991 is about 448.0956411851.

The spelling of 89972991 in words is "eighty-nine million, nine hundred seventy-two thousand, nine hundred ninety-one".