89972551 has 4 divisors (see below), whose sum is σ = 95265072. Its totient is φ = 84680032.

The previous prime is 89972537. The next prime is 89972591. The reversal of 89972551 is 15527998.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15527998 = 2 ⋅7763999.

It is a cyclic number.

It is not a de Polignac number, because 89972551 - 2⁷ = 89972423 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 (89972501) 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, 2646235 + ... + 2646268.

It is an arithmetic number, because the mean of its divisors is an integer number (23816268).

Almost surely, 2^89972551 is an apocalyptic number.

89972551 is a deficient number, since it is larger than the sum of its proper divisors (5292521).

89972551 is a wasteful number, since it uses less digits than its factorization.

89972551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5292520.

The product of its digits is 226800, while the sum is 46.

The square root of 89972551 is about 9485.3861808574. The cubic root of 89972551 is about 448.0949107348.

The spelling of 89972551 in words is "eighty-nine million, nine hundred seventy-two thousand, five hundred fifty-one".