79387261 has 4 divisors (see below), whose sum is σ = 79638012. Its totient is φ = 79136512.

The previous prime is 79387247. The next prime is 79387303. The reversal of 79387261 is 16278397.

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: 16278397 = 227 ⋅71711.

It can be written as a sum of positive squares in 2 ways, for example, as 14584761 + 64802500 = 3819^2 + 8050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79387261 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 (79387361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124900 + ... + 125533.

It is an arithmetic number, because the mean of its divisors is an integer number (19909503).

Almost surely, 2^79387261 is an apocalyptic number.

It is an amenable number.

79387261 is a deficient number, since it is larger than the sum of its proper divisors (250751).

79387261 is a wasteful number, since it uses less digits than its factorization.

79387261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250750.

The product of its digits is 127008, while the sum is 43.

The square root of 79387261 is about 8909.9529179452. The cubic root of 79387261 is about 429.7840289164.

The spelling of 79387261 in words is "seventy-nine million, three hundred eighty-seven thousand, two hundred sixty-one".