79271887 has 4 divisors (see below), whose sum is σ = 79730280. Its totient is φ = 78813496.

The previous prime is 79271861. The next prime is 79271893. The reversal of 79271887 is 78817297.

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

It is a cyclic number.

It is not a de Polignac number, because 79271887 - 2¹⁵ = 79239119 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 79271887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79271827) 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, 228937 + ... + 229282.

It is an arithmetic number, because the mean of its divisors is an integer number (19932570).

Almost surely, 2^79271887 is an apocalyptic number.

79271887 is a deficient number, since it is larger than the sum of its proper divisors (458393).

79271887 is a wasteful number, since it uses less digits than its factorization.

79271887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458392.

The product of its digits is 395136, while the sum is 49.

The square root of 79271887 is about 8903.4761189100. The cubic root of 79271887 is about 429.5757253737.

The spelling of 79271887 in words is "seventy-nine million, two hundred seventy-one thousand, eight hundred eighty-seven".