79145641 has 4 divisors (see below), whose sum is σ = 79165012. Its totient is φ = 79126272.

The previous prime is 79145629. The next prime is 79145657. The reversal of 79145641 is 14654197.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14654197 = 23 ⋅637139.

It can be written as a sum of positive squares in 2 ways, for example, as 61168041 + 17977600 = 7821^2 + 4240^2 .

It is a cyclic number.

It is not a de Polignac number, because 79145641 - 2⁷ = 79145513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79145641.

It is not an unprimeable number, because it can be changed into a prime (79145041) 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, 900 + ... + 12613.

It is an arithmetic number, because the mean of its divisors is an integer number (19791253).

Almost surely, 2^79145641 is an apocalyptic number.

It is an amenable number.

79145641 is a deficient number, since it is larger than the sum of its proper divisors (19371).

79145641 is a wasteful number, since it uses less digits than its factorization.

79145641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19370.

The product of its digits is 30240, while the sum is 37.

The square root of 79145641 is about 8896.3835911004. The cubic root of 79145641 is about 429.3475611232.

The spelling of 79145641 in words is "seventy-nine million, one hundred forty-five thousand, six hundred forty-one".