79261221 has 8 divisors (see below), whose sum is σ = 113811040. Its totient is φ = 48776112.

The previous prime is 79261219. The next prime is 79261261. The reversal of 79261221 is 12216297.

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

It is not a de Polignac number, because 79261221 - 2¹ = 79261219 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 (79261211) 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, 1016131 + ... + 1016208.

It is an arithmetic number, because the mean of its divisors is an integer number (14226380).

Almost surely, 2^79261221 is an apocalyptic number.

It is an amenable number.

79261221 is a deficient number, since it is larger than the sum of its proper divisors (34549819).

79261221 is a wasteful number, since it uses less digits than its factorization.

79261221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2032355.

The product of its digits is 3024, while the sum is 30.

The square root of 79261221 is about 8902.8771192239. The cubic root of 79261221 is about 429.5564580968.

The spelling of 79261221 in words is "seventy-nine million, two hundred sixty-one thousand, two hundred twenty-one".