187085139 has 8 divisors (see below), whose sum is σ = 249537792. Its totient is φ = 124677960.

The previous prime is 187085099. The next prime is 187085147. The reversal of 187085139 is 931580781.

187085139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 187085139 - 2⁸ = 187084883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 187085139.

It is not an unprimeable number, because it can be changed into a prime (187085149) 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, 199 + ... + 19344.

It is an arithmetic number, because the mean of its divisors is an integer number (31192224).

Almost surely, 2^187085139 is an apocalyptic number.

187085139 is a deficient number, since it is larger than the sum of its proper divisors (62452653).

187085139 is a wasteful number, since it uses less digits than its factorization.

187085139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22737.

The product of its (nonzero) digits is 60480, while the sum is 42.

The square root of 187085139 is about 13677.9069670765. The cubic root of 187085139 is about 571.9346786297.

The spelling of 187085139 in words is "one hundred eighty-seven million, eighty-five thousand, one hundred thirty-nine".