79440841 has 4 divisors (see below), whose sum is σ = 79844292. Its totient is φ = 79037392.

The previous prime is 79440839. The next prime is 79440859. The reversal of 79440841 is 14804497.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61293241 + 18147600 = 7829^2 + 4260^2 .

It is a cyclic number.

It is not a de Polignac number, because 79440841 - 2¹ = 79440839 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 79440841.

It is not an unprimeable number, because it can be changed into a prime (79443841) 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, 201430 + ... + 201823.

It is an arithmetic number, because the mean of its divisors is an integer number (19961073).

Almost surely, 2^79440841 is an apocalyptic number.

It is an amenable number.

79440841 is a deficient number, since it is larger than the sum of its proper divisors (403451).

79440841 is a wasteful number, since it uses less digits than its factorization.

79440841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403450.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 79440841 is about 8912.9591606828. The cubic root of 79440841 is about 429.8806970270.

The spelling of 79440841 in words is "seventy-nine million, four hundred forty thousand, eight hundred forty-one".