89717731 has 2 divisors, whose sum is σ = 89717732. Its totient is φ = 89717730.

The previous prime is 89717729. The next prime is 89717741. The reversal of 89717731 is 13771798.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 89717731 - 2¹ = 89717729 is a prime.

It is a super-2 number, since 2×89717731² = 16098542511576722, which contains 22 as substring.

Together with 89717729, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (89717741) 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 as a sum of consecutive naturals, namely, 44858865 + 44858866.

It is an arithmetic number, because the mean of its divisors is an integer number (44858866).

Almost surely, 2^89717731 is an apocalyptic number.

89717731 is a deficient number, since it is larger than the sum of its proper divisors (1).

89717731 is an equidigital number, since it uses as much as digits as its factorization.

89717731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74088, while the sum is 43.

The square root of 89717731 is about 9471.9444149551. The cubic root of 89717731 is about 447.6714796972.

The spelling of 89717731 in words is "eighty-nine million, seven hundred seventeen thousand, seven hundred thirty-one".