79279138 has 8 divisors (see below), whose sum is σ = 120868380. Its totient is φ = 38989680.

The previous prime is 79279133. The next prime is 79279139. The reversal of 79279138 is 83197297.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 52374169 + 26904969 = 7237^2 + 5187^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×79279138³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (79279133) 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, 324793 + ... + 325036.

Almost surely, 2^79279138 is an apocalyptic number.

79279138 is a deficient number, since it is larger than the sum of its proper divisors (41589242).

79279138 is a wasteful number, since it uses less digits than its factorization.

79279138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649892.

The product of its digits is 190512, while the sum is 46.

The square root of 79279138 is about 8903.8833101069. The cubic root of 79279138 is about 429.5888227392.

The spelling of 79279138 in words is "seventy-nine million, two hundred seventy-nine thousand, one hundred thirty-eight".