79247918 has 4 divisors (see below), whose sum is σ = 118871880. Its totient is φ = 39623958.

The previous prime is 79247911. The next prime is 79247929. The reversal of 79247918 is 81974297.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81974297 = 43 ⋅1906379.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79247911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19811978 + ... + 19811981.

It is an arithmetic number, because the mean of its divisors is an integer number (29717970).

Almost surely, 2^79247918 is an apocalyptic number.

79247918 is a deficient number, since it is larger than the sum of its proper divisors (39623962).

79247918 is a wasteful number, since it uses less digits than its factorization.

79247918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39623961.

The product of its digits is 254016, while the sum is 47.

The square root of 79247918 is about 8902.1299698443. The cubic root of 79247918 is about 429.5324248676.

The spelling of 79247918 in words is "seventy-nine million, two hundred forty-seven thousand, nine hundred eighteen".