89457979 has 4 divisors (see below), whose sum is σ = 96339376. Its totient is φ = 82576584.

The previous prime is 89457937. The next prime is 89457989. The reversal of 89457979 is 97975498.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97975498 = 2 ⋅48987749.

It is a cyclic number.

It is not a de Polignac number, because 89457979 - 2¹⁵ = 89425211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89457989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3440679 + ... + 3440704.

It is an arithmetic number, because the mean of its divisors is an integer number (24084844).

Almost surely, 2^89457979 is an apocalyptic number.

89457979 is a deficient number, since it is larger than the sum of its proper divisors (6881397).

89457979 is a wasteful number, since it uses less digits than its factorization.

89457979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6881396.

The product of its digits is 5715360, while the sum is 58.

The square root of 89457979 is about 9458.2228246114. Note that the first 3 decimals coincide. The cubic root of 89457979 is about 447.2390272204.

The spelling of 89457979 in words is "eighty-nine million, four hundred fifty-seven thousand, nine hundred seventy-nine".