187130639 has 8 divisors (see below), whose sum is σ = 197105280. Its totient is φ = 177168600.

The previous prime is 187130627. The next prime is 187130689. The reversal of 187130639 is 936031781.

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

It is a cyclic number.

It is not a de Polignac number, because 187130639 - 2⁴ = 187130623 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 (187130689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55574 + ... + 58844.

It is an arithmetic number, because the mean of its divisors is an integer number (24638160).

Almost surely, 2^187130639 is an apocalyptic number.

187130639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

187130639 is a deficient number, since it is larger than the sum of its proper divisors (9974641).

187130639 is a wasteful number, since it uses less digits than its factorization.

187130639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6301.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 187130639 is about 13679.5701321350. The cubic root of 187130639 is about 571.9810406205.

The spelling of 187130639 in words is "one hundred eighty-seven million, one hundred thirty thousand, six hundred thirty-nine".