79809493 has 8 divisors (see below), whose sum is σ = 82569816. Its totient is φ = 77088000.

The previous prime is 79809463. The next prime is 79809497. The reversal of 79809493 is 39490897.

It can be written as a sum of positive squares in 4 ways, for example, as 17114769 + 62694724 = 4137^2 + 7918^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 79809493 - 2¹⁷ = 79678421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79809497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5496 + ... + 13777.

It is an arithmetic number, because the mean of its divisors is an integer number (10321227).

Almost surely, 2^79809493 is an apocalyptic number.

It is an amenable number.

79809493 is a deficient number, since it is larger than the sum of its proper divisors (2760323).

79809493 is a wasteful number, since it uses less digits than its factorization.

79809493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19415.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 79809493 is about 8933.6158972725. The cubic root of 79809493 is about 430.5446370765.

The spelling of 79809493 in words is "seventy-nine million, eight hundred nine thousand, four hundred ninety-three".