89789531 has 6 divisors (see below), whose sum is σ = 97227900. Its totient is φ = 82882488.

The previous prime is 89789527. The next prime is 89789543. The reversal of 89789531 is 13598798.

It is not a de Polignac number, because 89789531 - 2² = 89789527 is a prime.

It is a super-2 number, since 2×89789531² = 16124319754399922, which contains 22 as substring.

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 89789531.

It is not an unprimeable number, because it can be changed into a prime (89789551) 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 5 ways as a sum of consecutive naturals, for example, 265481 + ... + 265818.

It is an arithmetic number, because the mean of its divisors is an integer number (16204650).

Almost surely, 2^89789531 is an apocalyptic number.

89789531 is a deficient number, since it is larger than the sum of its proper divisors (7438369).

89789531 is a wasteful number, since it uses less digits than its factorization.

89789531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531325 (or 531312 counting only the distinct ones).

The product of its digits is 544320, while the sum is 50.

The square root of 89789531 is about 9475.7337974428. The cubic root of 89789531 is about 447.7908698527.

The spelling of 89789531 in words is "eighty-nine million, seven hundred eighty-nine thousand, five hundred thirty-one".