79400843 has 4 divisors (see below), whose sum is σ = 80746680. Its totient is φ = 78055008.

The previous prime is 79400821. The next prime is 79400851. The reversal of 79400843 is 34800497.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34800497 = 113 ⋅307969.

It is a cyclic number.

It is not a de Polignac number, because 79400843 - 2¹² = 79396747 is a prime.

It is a super-2 number, since 2×79400843² = 12608987738221298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79400873) 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, 672830 + ... + 672947.

It is an arithmetic number, because the mean of its divisors is an integer number (20186670).

Almost surely, 2^79400843 is an apocalyptic number.

79400843 is a deficient number, since it is larger than the sum of its proper divisors (1345837).

79400843 is a wasteful number, since it uses less digits than its factorization.

79400843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345836.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 79400843 is about 8910.7150667048. The cubic root of 79400843 is about 429.8085374406.

The spelling of 79400843 in words is "seventy-nine million, four hundred thousand, eight hundred forty-three".