79937281 has 8 divisors (see below), whose sum is σ = 85072680. Its totient is φ = 74850048.

The previous prime is 79937269. The next prime is 79937287. The reversal of 79937281 is 18273997.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 57517056 + 22420225 = 7584^2 + 4735^2 .

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

It is not a de Polignac number, because 79937281 - 2¹³ = 79929089 is a prime.

It is a super-2 number, since 2×79937281² = 12779937787345922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79937287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8586 + ... + 15283.

It is an arithmetic number, because the mean of its divisors is an integer number (10634085).

Almost surely, 2^79937281 is an apocalyptic number.

It is an amenable number.

79937281 is a deficient number, since it is larger than the sum of its proper divisors (5135399).

79937281 is a wasteful number, since it uses less digits than its factorization.

79937281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24083.

The product of its digits is 190512, while the sum is 46.

The square root of 79937281 is about 8940.7651238582. The cubic root of 79937281 is about 430.7743052426.

The spelling of 79937281 in words is "seventy-nine million, nine hundred thirty-seven thousand, two hundred eighty-one".