89019979 has 4 divisors (see below), whose sum is σ = 91191240. Its totient is φ = 86848720.

The previous prime is 89019971. The next prime is 89020027. The reversal of 89019979 is 97991098.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97991098 = 2 ⋅48995549.

It is a cyclic number.

It is not a de Polignac number, because 89019979 - 2³ = 89019971 is a prime.

It is a super-2 number, since 2×89019979² = 15849113322320882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89019971) 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, 1085569 + ... + 1085650.

It is an arithmetic number, because the mean of its divisors is an integer number (22797810).

Almost surely, 2^89019979 is an apocalyptic number.

89019979 is a deficient number, since it is larger than the sum of its proper divisors (2171261).

89019979 is a wasteful number, since it uses less digits than its factorization.

89019979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2171260.

The product of its (nonzero) digits is 367416, while the sum is 52.

The square root of 89019979 is about 9435.0399575201. The cubic root of 89019979 is about 446.5079157264.

It can be divided in two parts, 89019 and 979, that added together give a palindrome (89998).

The spelling of 89019979 in words is "eighty-nine million, nineteen thousand, nine hundred seventy-nine".