79829621 has 8 divisors (see below), whose sum is σ = 84208320. Its totient is φ = 75468672.

The previous prime is 79829611. The next prime is 79829627. The reversal of 79829621 is 12692897.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79829621 - 2²² = 75635317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79829627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5381 + ... + 13733.

It is an arithmetic number, because the mean of its divisors is an integer number (10526040).

Almost surely, 2^79829621 is an apocalyptic number.

It is an amenable number.

79829621 is a deficient number, since it is larger than the sum of its proper divisors (4378699).

79829621 is a wasteful number, since it uses less digits than its factorization.

79829621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8875.

The product of its digits is 108864, while the sum is 44.

The square root of 79829621 is about 8934.7423577851. The cubic root of 79829621 is about 430.5808285691.

The spelling of 79829621 in words is "seventy-nine million, eight hundred twenty-nine thousand, six hundred twenty-one".