89023981 has 4 divisors (see below), whose sum is σ = 89941852. Its totient is φ = 88106112.

The previous prime is 89023973. The next prime is 89024009. The reversal of 89023981 is 18932098.

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

It can be written as a sum of positive squares in 2 ways, for example, as 74132100 + 14891881 = 8610^2 + 3859^2 .

It is a cyclic number.

It is not a de Polignac number, because 89023981 - 2³ = 89023973 is a prime.

It is a super-2 number, since 2×89023981² = 15850538386176722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89093981) 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, 458790 + ... + 458983.

It is an arithmetic number, because the mean of its divisors is an integer number (22485463).

Almost surely, 2^89023981 is an apocalyptic number.

It is an amenable number.

89023981 is a deficient number, since it is larger than the sum of its proper divisors (917871).

89023981 is an equidigital number, since it uses as much as digits as its factorization.

89023981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917870.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 89023981 is about 9435.2520369092. The cubic root of 89023981 is about 446.5146067259.

The spelling of 89023981 in words is "eighty-nine million, twenty-three thousand, nine hundred eighty-one".