89172138 has 16 divisors (see below), whose sum is σ = 194557536. Its totient is φ = 27021840.

The previous prime is 89172133. The next prime is 89172143. The reversal of 89172138 is 83127198.

It is an interprime number because it is at equal distance from previous prime (89172133) and next prime (89172143).

It is a junction number, because it is equal to n+sod(n) for n = 89172096 and 89172105.

It is not an unprimeable number, because it can be changed into a prime (89172131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 675481 + ... + 675612.

It is an arithmetic number, because the mean of its divisors is an integer number (12159846).

Almost surely, 2^89172138 is an apocalyptic number.

89172138 is an abundant number, since it is smaller than the sum of its proper divisors (105385398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

89172138 is a wasteful number, since it uses less digits than its factorization.

89172138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351109.

The product of its digits is 24192, while the sum is 39.

The square root of 89172138 is about 9443.1000206500. The cubic root of 89172138 is about 446.7621714792.

The spelling of 89172138 in words is "eighty-nine million, one hundred seventy-two thousand, one hundred thirty-eight".