79983643 has 4 divisors (see below), whose sum is σ = 80513488. Its totient is φ = 79453800.

The previous prime is 79983637. The next prime is 79983737. The reversal of 79983643 is 34638997.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79983643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79987643) 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, 264696 + ... + 264997.

It is an arithmetic number, because the mean of its divisors is an integer number (20128372).

Almost surely, 2^79983643 is an apocalyptic number.

79983643 is a deficient number, since it is larger than the sum of its proper divisors (529845).

79983643 is a wasteful number, since it uses less digits than its factorization.

79983643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529844.

The product of its digits is 979776, while the sum is 49.

The square root of 79983643 is about 8943.3574791574. The cubic root of 79983643 is about 430.8575692645.

The spelling of 79983643 in words is "seventy-nine million, nine hundred eighty-three thousand, six hundred forty-three".