89959979 has 4 divisors (see below), whose sum is σ = 90092376. Its totient is φ = 89827584.

The previous prime is 89959973. The next prime is 89959981. The reversal of 89959979 is 97995998.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97995998 = 2 ⋅48997999.

It is a cyclic number.

It is not a de Polignac number, because 89959979 - 2⁴ = 89959963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89959973) 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, 65174 + ... + 66539.

It is an arithmetic number, because the mean of its divisors is an integer number (22523094).

Almost surely, 2^89959979 is an apocalyptic number.

89959979 is a deficient number, since it is larger than the sum of its proper divisors (132397).

89959979 is a wasteful number, since it uses less digits than its factorization.

89959979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132396.

The product of its digits is 16533720, while the sum is 65.

The square root of 89959979 is about 9484.7234540602. The cubic root of 89959979 is about 448.0740387704.

The spelling of 89959979 in words is "eighty-nine million, nine hundred fifty-nine thousand, nine hundred seventy-nine".