187872479 has 4 divisors (see below), whose sum is σ = 188513976. Its totient is φ = 187230984.

The previous prime is 187872467. The next prime is 187872499. The reversal of 187872479 is 974278781.

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 187872479 - 2⁴ = 187872463 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 187872479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187872499) 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, 320309 + ... + 320894.

It is an arithmetic number, because the mean of its divisors is an integer number (47128494).

Almost surely, 2^187872479 is an apocalyptic number.

187872479 is a deficient number, since it is larger than the sum of its proper divisors (641497).

187872479 is an equidigital number, since it uses as much as digits as its factorization.

187872479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641496.

The product of its digits is 1580544, while the sum is 53.

The square root of 187872479 is about 13706.6581995759. The cubic root of 187872479 is about 572.7358768178.

The spelling of 187872479 in words is "one hundred eighty-seven million, eight hundred seventy-two thousand, four hundred seventy-nine".