89172871 has 16 divisors (see below), whose sum is σ = 101282400. Its totient is φ = 77995008.

The previous prime is 89172869. The next prime is 89172877. The reversal of 89172871 is 17827198.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 89172871 - 2¹ = 89172869 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 (89172877) by changing a digit.

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, 14515 + ... + 19723.

It is an arithmetic number, because the mean of its divisors is an integer number (6330150).

Almost surely, 2^89172871 is an apocalyptic number.

89172871 is a deficient number, since it is larger than the sum of its proper divisors (12109529).

89172871 is a wasteful number, since it uses less digits than its factorization.

89172871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5298.

The product of its digits is 56448, while the sum is 43.

The square root of 89172871 is about 9443.1388319774. The cubic root of 89172871 is about 446.7633956126.

The spelling of 89172871 in words is "eighty-nine million, one hundred seventy-two thousand, eight hundred seventy-one".