79531689 has 8 divisors (see below), whose sum is σ = 106260192. Its totient is φ = 52912160.

The previous prime is 79531681. The next prime is 79531691. The reversal of 79531689 is 98613597.

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

It is a cyclic number.

It is not a de Polignac number, because 79531689 - 2³ = 79531681 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79531681) 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, 25524 + ... + 28469.

It is an arithmetic number, because the mean of its divisors is an integer number (13282524).

Almost surely, 2^79531689 is an apocalyptic number.

It is an amenable number.

79531689 is a deficient number, since it is larger than the sum of its proper divisors (26728503).

79531689 is a wasteful number, since it uses less digits than its factorization.

79531689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54487.

The product of its digits is 408240, while the sum is 48.

The square root of 79531689 is about 8918.0541038951. The cubic root of 79531689 is about 430.0445041372.

The spelling of 79531689 in words is "seventy-nine million, five hundred thirty-one thousand, six hundred eighty-nine".