89970731 has 4 divisors (see below), whose sum is σ = 93073200. Its totient is φ = 86868264.

The previous prime is 89970709. The next prime is 89970743. The reversal of 89970731 is 13707998.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13707998 = 2 ⋅6853999.

It is a cyclic number.

It is not a de Polignac number, because 89970731 - 2⁶ = 89970667 is a prime.

It is a super-2 number, since 2×89970731² = 16189464873348722, which contains 22 as substring.

It is a Duffinian number.

89970731 is a modest number, since divided by 70731 gives 899 as remainder.

It is not an unprimeable number, because it can be changed into a prime (89970761) 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, 1551191 + ... + 1551248.

It is an arithmetic number, because the mean of its divisors is an integer number (23268300).

Almost surely, 2^89970731 is an apocalyptic number.

89970731 is a deficient number, since it is larger than the sum of its proper divisors (3102469).

89970731 is a wasteful number, since it uses less digits than its factorization.

89970731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3102468.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 89970731 is about 9485.2902433189. The cubic root of 89970731 is about 448.0918893013.

The spelling of 89970731 in words is "eighty-nine million, nine hundred seventy thousand, seven hundred thirty-one".