79143887 has 4 divisors (see below), whose sum is σ = 79276176. Its totient is φ = 79011600.

The previous prime is 79143877. The next prime is 79143907. The reversal of 79143887 is 78834197.

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 79143887 - 2¹⁰ = 79142863 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 (79143847) 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, 65243 + ... + 66444.

It is an arithmetic number, because the mean of its divisors is an integer number (19819044).

Almost surely, 2^79143887 is an apocalyptic number.

79143887 is a deficient number, since it is larger than the sum of its proper divisors (132289).

79143887 is a wasteful number, since it uses less digits than its factorization.

79143887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132288.

The product of its digits is 338688, while the sum is 47.

The square root of 79143887 is about 8896.2850111718. The cubic root of 79143887 is about 429.3443894127.

The spelling of 79143887 in words is "seventy-nine million, one hundred forty-three thousand, eight hundred eighty-seven".