79540689 has 8 divisors (see below), whose sum is σ = 106390080. Its totient is φ = 52859216.

The previous prime is 79540667. The next prime is 79540717. The reversal of 79540689 is 98604597.

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 79540689 - 2⁷ = 79540561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79540589) 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, 40869 + ... + 42770.

It is an arithmetic number, because the mean of its divisors is an integer number (13298760).

Almost surely, 2^79540689 is an apocalyptic number.

It is an amenable number.

79540689 is a deficient number, since it is larger than the sum of its proper divisors (26849391).

79540689 is a wasteful number, since it uses less digits than its factorization.

79540689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83959.

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 79540689 is about 8918.5586840027. The cubic root of 79540689 is about 430.0607251539.

The spelling of 79540689 in words is "seventy-nine million, five hundred forty thousand, six hundred eighty-nine".