89731641 has 4 divisors (see below), whose sum is σ = 119642192. Its totient is φ = 59821092.

The previous prime is 89731619. The next prime is 89731651. The reversal of 89731641 is 14613798.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 89731641 - 2⁷ = 89731513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 89731641.

It is not an unprimeable number, because it can be changed into a prime (89731651) 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 3 ways as a sum of consecutive naturals, for example, 14955271 + ... + 14955276.

It is an arithmetic number, because the mean of its divisors is an integer number (29910548).

Almost surely, 2^89731641 is an apocalyptic number.

It is an amenable number.

89731641 is a deficient number, since it is larger than the sum of its proper divisors (29910551).

89731641 is a wasteful number, since it uses less digits than its factorization.

89731641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29910550.

The product of its digits is 36288, while the sum is 39.

The square root of 89731641 is about 9472.6786602312. The cubic root of 89731641 is about 447.6946144348.

The spelling of 89731641 in words is "eighty-nine million, seven hundred thirty-one thousand, six hundred forty-one".