79343981 has 16 divisors (see below), whose sum is σ = 89904960. Its totient is φ = 69569280.

The previous prime is 79343977. The next prime is 79343983. The reversal of 79343981 is 18934397.

It is a happy number.

It is not a de Polignac number, because 79343981 - 2² = 79343977 is a prime.

It is a super-2 number, since 2×79343981² = 12590934641856722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79343983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17690 + ... + 21716.

It is an arithmetic number, because the mean of its divisors is an integer number (5619060).

Almost surely, 2^79343981 is an apocalyptic number.

It is an amenable number.

79343981 is a deficient number, since it is larger than the sum of its proper divisors (10560979).

79343981 is a wasteful number, since it uses less digits than its factorization.

79343981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4124.

The product of its digits is 163296, while the sum is 44.

The square root of 79343981 is about 8907.5238422358. The cubic root of 79343981 is about 429.7059121261.

The spelling of 79343981 in words is "seventy-nine million, three hundred forty-three thousand, nine hundred eighty-one".