79772621 has 8 divisors (see below), whose sum is σ = 84064320. Its totient is φ = 75490272.

The previous prime is 79772617. The next prime is 79772633. The reversal of 79772621 is 12627797.

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 79772621 - 2² = 79772617 is a prime.

It is a super-2 number, since 2×79772621² = 12727342122419282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79772521) 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, 21521 + ... + 24953.

It is an arithmetic number, because the mean of its divisors is an integer number (10508040).

Almost surely, 2^79772621 is an apocalyptic number.

It is an amenable number.

79772621 is a deficient number, since it is larger than the sum of its proper divisors (4291699).

79772621 is a wasteful number, since it uses less digits than its factorization.

79772621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4675.

The product of its digits is 74088, while the sum is 41.

The square root of 79772621 is about 8931.5519927950. The cubic root of 79772621 is about 430.4783229634.

The spelling of 79772621 in words is "seventy-nine million, seven hundred seventy-two thousand, six hundred twenty-one".