89978031 has 48 divisors (see below), whose sum is σ = 154033152. Its totient is φ = 49896000.

The previous prime is 89978023. The next prime is 89978041. The reversal of 89978031 is 13087998.

It is not a de Polignac number, because 89978031 - 2³ = 89978023 is a prime.

It is a super-2 number, since 2×89978031² = 16192092125273922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89978041) 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 in 47 ways as a sum of consecutive naturals, for example, 194106 + ... + 194568.

It is an arithmetic number, because the mean of its divisors is an integer number (3209024).

Almost surely, 2^89978031 is an apocalyptic number.

89978031 is a deficient number, since it is larger than the sum of its proper divisors (64055121).

89978031 is a wasteful number, since it uses less digits than its factorization.

89978031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 89978031 is about 9485.6750418723. The cubic root of 89978031 is about 448.1040079918.

It can be divided in two parts, 899780 and 31, that added together give a triangular number (899811 = T₁₃₄₁).

The spelling of 89978031 in words is "eighty-nine million, nine hundred seventy-eight thousand, thirty-one".