89172539 has 2 divisors, whose sum is σ = 89172540. Its totient is φ = 89172538.

The previous prime is 89172509. The next prime is 89172563. The reversal of 89172539 is 93527198.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89172539 - 2⁸ = 89172283 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89172539.

It is not a weakly prime, because it can be changed into another prime (89172509) 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 as a sum of consecutive naturals, namely, 44586269 + 44586270.

It is an arithmetic number, because the mean of its divisors is an integer number (44586270).

Almost surely, 2^89172539 is an apocalyptic number.

89172539 is a deficient number, since it is larger than the sum of its proper divisors (1).

89172539 is an equidigital number, since it uses as much as digits as its factorization.

89172539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 44.

The square root of 89172539 is about 9443.1212530603. The cubic root of 89172539 is about 446.7628411628.

The spelling of 89172539 in words is "eighty-nine million, one hundred seventy-two thousand, five hundred thirty-nine".