79218897 has 4 divisors (see below), whose sum is σ = 105625200. Its totient is φ = 52812596.

The previous prime is 79218883. The next prime is 79218901. The reversal of 79218897 is 79881297.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79881297 = 3 ⋅26627099.

It is a cyclic number.

It is not a de Polignac number, because 79218897 - 2²³ = 70830289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79218817) 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, 13203147 + ... + 13203152.

It is an arithmetic number, because the mean of its divisors is an integer number (26406300).

Almost surely, 2^79218897 is an apocalyptic number.

It is an amenable number.

79218897 is a deficient number, since it is larger than the sum of its proper divisors (26406303).

79218897 is a wasteful number, since it uses less digits than its factorization.

79218897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26406302.

The product of its digits is 508032, while the sum is 51.

The square root of 79218897 is about 8900.4998174260. The cubic root of 79218897 is about 429.4799861295.

The spelling of 79218897 in words is "seventy-nine million, two hundred eighteen thousand, eight hundred ninety-seven".