89406979 has 4 divisors (see below), whose sum is σ = 89664984. Its totient is φ = 89148976.

The previous prime is 89406943. The next prime is 89406983. The reversal of 89406979 is 97960498.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97960498 = 2 ⋅48980249.

It is a cyclic number.

It is not a de Polignac number, because 89406979 - 2¹³ = 89398787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89406929) 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, 128482 + ... + 129175.

It is an arithmetic number, because the mean of its divisors is an integer number (22416246).

Almost surely, 2^89406979 is an apocalyptic number.

89406979 is a deficient number, since it is larger than the sum of its proper divisors (258005).

89406979 is a wasteful number, since it uses less digits than its factorization.

89406979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258004.

The product of its (nonzero) digits is 979776, while the sum is 52.

The square root of 89406979 is about 9455.5263735024. The cubic root of 89406979 is about 447.1540207308.

The spelling of 89406979 in words is "eighty-nine million, four hundred six thousand, nine hundred seventy-nine".