79138493 has 8 divisors (see below), whose sum is σ = 90501312. Its totient is φ = 67790016.

The previous prime is 79138489. The next prime is 79138513. The reversal of 79138493 is 39483197.

It is a happy number.

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

It is not a de Polignac number, because 79138493 - 2² = 79138489 is a prime.

It is a super-2 number, since 2×79138493² = 12525802148622098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79138793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14021 + ... + 18837.

It is an arithmetic number, because the mean of its divisors is an integer number (11312664).

Almost surely, 2^79138493 is an apocalyptic number.

It is an amenable number.

79138493 is a deficient number, since it is larger than the sum of its proper divisors (11362819).

79138493 is a wasteful number, since it uses less digits than its factorization.

79138493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7171.

The product of its digits is 163296, while the sum is 44.

The square root of 79138493 is about 8895.9818457549. The cubic root of 79138493 is about 429.3346352955.

The spelling of 79138493 in words is "seventy-nine million, one hundred thirty-eight thousand, four hundred ninety-three".