79467221 has 4 divisors (see below), whose sum is σ = 82207500. Its totient is φ = 76726944.

The previous prime is 79467211. The next prime is 79467233. The reversal of 79467221 is 12276497.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33756100 + 45711121 = 5810^2 + 6761^2 .

It is a cyclic number.

It is not a de Polignac number, because 79467221 - 2¹⁰ = 79466197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79467211) 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, 1370096 + ... + 1370153.

It is an arithmetic number, because the mean of its divisors is an integer number (20551875).

Almost surely, 2^79467221 is an apocalyptic number.

It is an amenable number.

79467221 is a deficient number, since it is larger than the sum of its proper divisors (2740279).

79467221 is a wasteful number, since it uses less digits than its factorization.

79467221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2740278.

The product of its digits is 42336, while the sum is 38.

The square root of 79467221 is about 8914.4389055061. The cubic root of 79467221 is about 429.9282753994.

The spelling of 79467221 in words is "seventy-nine million, four hundred sixty-seven thousand, two hundred twenty-one".