79317943 has 4 divisors (see below), whose sum is σ = 79761240. Its totient is φ = 78874648.

The previous prime is 79317859. The next prime is 79317947. The reversal of 79317943 is 34971397.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34971397 = 17 ⋅2057141.

It is a cyclic number.

It is not a de Polignac number, because 79317943 - 2¹⁷ = 79186871 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79317943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79317947) 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, 221380 + ... + 221737.

It is an arithmetic number, because the mean of its divisors is an integer number (19940310).

Almost surely, 2^79317943 is an apocalyptic number.

79317943 is a deficient number, since it is larger than the sum of its proper divisors (443297).

79317943 is a wasteful number, since it uses less digits than its factorization.

79317943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443296.

The product of its digits is 142884, while the sum is 43.

The square root of 79317943 is about 8906.0621488961. The cubic root of 79317943 is about 429.6589020209.

The spelling of 79317943 in words is "seventy-nine million, three hundred seventeen thousand, nine hundred forty-three".