79672643 has 4 divisors (see below), whose sum is σ = 83865960. Its totient is φ = 75479328.

The previous prime is 79672631. The next prime is 79672651. The reversal of 79672643 is 34627697.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34627697 = 13 ⋅2663669.

It is a cyclic number.

It is not a de Polignac number, because 79672643 - 2²² = 75478339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79672594 and 79672603.

It is not an unprimeable number, because it can be changed into a prime (79672603) 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, 2096630 + ... + 2096667.

It is an arithmetic number, because the mean of its divisors is an integer number (20966490).

Almost surely, 2^79672643 is an apocalyptic number.

79672643 is a deficient number, since it is larger than the sum of its proper divisors (4193317).

79672643 is a wasteful number, since it uses less digits than its factorization.

79672643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4193316.

The product of its digits is 381024, while the sum is 44.

The square root of 79672643 is about 8925.9533384395. The cubic root of 79672643 is about 430.2984101329.

The spelling of 79672643 in words is "seventy-nine million, six hundred seventy-two thousand, six hundred forty-three".