79440659 has 4 divisors (see below), whose sum is σ = 80066304. Its totient is φ = 78815016.

The previous prime is 79440619. The next prime is 79440661. The reversal of 79440659 is 95604497.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79440659 - 2¹⁶ = 79375123 is a prime.

It is a super-3 number, since 3×79440659³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79440619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312632 + ... + 312885.

It is an arithmetic number, because the mean of its divisors is an integer number (20016576).

Almost surely, 2^79440659 is an apocalyptic number.

79440659 is a deficient number, since it is larger than the sum of its proper divisors (625645).

79440659 is a wasteful number, since it uses less digits than its factorization.

79440659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625644.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 79440659 is about 8912.9489508243. The cubic root of 79440659 is about 429.8803687393.

The spelling of 79440659 in words is "seventy-nine million, four hundred forty thousand, six hundred fifty-nine".