79541139 has 4 divisors (see below), whose sum is σ = 106054856. Its totient is φ = 53027424.

The previous prime is 79541129. The next prime is 79541149. The reversal of 79541139 is 93114597.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93114597 = 3 ⋅31038199.

It is an interprime number because it is at equal distance from previous prime (79541129) and next prime (79541149).

It is not a de Polignac number, because 79541139 - 2⁴ = 79541123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79541097 and 79541106.

It is not an unprimeable number, because it can be changed into a prime (79541129) 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, 13256854 + ... + 13256859.

It is an arithmetic number, because the mean of its divisors is an integer number (26513714).

Almost surely, 2^79541139 is an apocalyptic number.

79541139 is a deficient number, since it is larger than the sum of its proper divisors (26513717).

79541139 is a wasteful number, since it uses less digits than its factorization.

79541139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26513716.

The product of its digits is 34020, while the sum is 39.

The square root of 79541139 is about 8918.5839122587. The cubic root of 79541139 is about 430.0615361726.

The spelling of 79541139 in words is "seventy-nine million, five hundred forty-one thousand, one hundred thirty-nine".