79018221 has 8 divisors (see below), whose sum is σ = 105989184. Its totient is φ = 52363040.

The previous prime is 79018213. The next prime is 79018229. The reversal of 79018221 is 12281097.

It is an interprime number because it is at equal distance from previous prime (79018213) and next prime (79018229).

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 79018221 - 2³ = 79018213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79018229) 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, 78360 + ... + 79361.

It is an arithmetic number, because the mean of its divisors is an integer number (13248648).

Almost surely, 2^79018221 is an apocalyptic number.

It is an amenable number.

79018221 is a deficient number, since it is larger than the sum of its proper divisors (26970963).

79018221 is a wasteful number, since it uses less digits than its factorization.

79018221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157891.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 79018221 is about 8889.2193695510. The cubic root of 79018221 is about 429.1170289445.

The spelling of 79018221 in words is "seventy-nine million, eighteen thousand, two hundred twenty-one".