79868311 has 4 divisors (see below), whose sum is σ = 82026952. Its totient is φ = 77709672.

The previous prime is 79868309. The next prime is 79868317. The reversal of 79868311 is 11386897.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11386897 = 113 ⋅100769.

It is a cyclic number.

It is not a de Polignac number, because 79868311 - 2¹ = 79868309 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 (79868317) 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, 1079265 + ... + 1079338.

It is an arithmetic number, because the mean of its divisors is an integer number (20506738).

Almost surely, 2^79868311 is an apocalyptic number.

79868311 is a deficient number, since it is larger than the sum of its proper divisors (2158641).

79868311 is a wasteful number, since it uses less digits than its factorization.

79868311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2158640.

The product of its digits is 72576, while the sum is 43.

The square root of 79868311 is about 8936.9072390844. The cubic root of 79868311 is about 430.6503786995.

The spelling of 79868311 in words is "seventy-nine million, eight hundred sixty-eight thousand, three hundred eleven".