89312831 has 4 divisors (see below), whose sum is σ = 91213152. Its totient is φ = 87412512.

The previous prime is 89312813. The next prime is 89312851. The reversal of 89312831 is 13821398.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89312831 is a prime.

It is a super-2 number, since 2×89312831² = 15953563562469122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 89312791 and 89312800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89312851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 950090 + ... + 950183.

It is an arithmetic number, because the mean of its divisors is an integer number (22803288).

Almost surely, 2^89312831 is an apocalyptic number.

89312831 is a deficient number, since it is larger than the sum of its proper divisors (1900321).

89312831 is a wasteful number, since it uses less digits than its factorization.

89312831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900320.

The product of its digits is 10368, while the sum is 35.

The square root of 89312831 is about 9450.5465979487. The cubic root of 89312831 is about 446.9970104583.

The spelling of 89312831 in words is "eighty-nine million, three hundred twelve thousand, eight hundred thirty-one".