79298221 has 4 divisors (see below), whose sum is σ = 80384572. Its totient is φ = 78211872.

The previous prime is 79298207. The next prime is 79298239. The reversal of 79298221 is 12289297.

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 54597321 + 24700900 = 7389^2 + 4970^2 .

It is a cyclic number.

It is not a de Polignac number, because 79298221 - 2⁵ = 79298189 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 (79298201) 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, 543066 + ... + 543211.

It is an arithmetic number, because the mean of its divisors is an integer number (20096143).

Almost surely, 2^79298221 is an apocalyptic number.

It is an amenable number.

79298221 is a deficient number, since it is larger than the sum of its proper divisors (1086351).

79298221 is a wasteful number, since it uses less digits than its factorization.

79298221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086350.

The product of its digits is 36288, while the sum is 40.

The square root of 79298221 is about 8904.9548567076. The cubic root of 79298221 is about 429.6232882410.

The spelling of 79298221 in words is "seventy-nine million, two hundred ninety-eight thousand, two hundred twenty-one".