79985951 has 4 divisors (see below), whose sum is σ = 80003952. Its totient is φ = 79967952.

The previous prime is 79985933. The next prime is 79985959. The reversal of 79985951 is 15958997.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15958997 = 2339 ⋅6823.

It is a cyclic number.

It is not a de Polignac number, because 79985951 - 2¹⁸ = 79723807 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79985893 and 79985902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79985959) 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, 2990 + ... + 12996.

It is an arithmetic number, because the mean of its divisors is an integer number (20000988).

Almost surely, 2^79985951 is an apocalyptic number.

79985951 is a deficient number, since it is larger than the sum of its proper divisors (18001).

79985951 is a wasteful number, since it uses less digits than its factorization.

79985951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18000.

The product of its digits is 1020600, while the sum is 53.

The square root of 79985951 is about 8943.4865125408. The cubic root of 79985951 is about 430.8617134856.

The spelling of 79985951 in words is "seventy-nine million, nine hundred eighty-five thousand, nine hundred fifty-one".