79933989 has 8 divisors (see below), whose sum is σ = 106688320. Its totient is φ = 53234496.

The previous prime is 79933963. The next prime is 79933991. The reversal of 79933989 is 98933997.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 79933989 - 2⁵ = 79933957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79933999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10177 + ... + 16230.

It is an arithmetic number, because the mean of its divisors is an integer number (13336040).

Almost surely, 2^79933989 is an apocalyptic number.

It is an amenable number.

79933989 is a deficient number, since it is larger than the sum of its proper divisors (26754331).

79933989 is a wasteful number, since it uses less digits than its factorization.

79933989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27419.

The product of its digits is 3306744, while the sum is 57.

The square root of 79933989 is about 8940.5810213878. The cubic root of 79933989 is about 430.7683917378.

The spelling of 79933989 in words is "seventy-nine million, nine hundred thirty-three thousand, nine hundred eighty-nine".