186972130 has 8 divisors (see below), whose sum is σ = 336549852. Its totient is φ = 74788848.

The previous prime is 186972113. The next prime is 186972167. The reversal of 186972130 is 31279681.

It can be written as a sum of positive squares in 2 ways, for example, as 159188689 + 27783441 = 12617^2 + 5271^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 186972130.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9348597 + ... + 9348616.

Almost surely, 2^186972130 is an apocalyptic number.

186972130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

186972130 is a deficient number, since it is larger than the sum of its proper divisors (149577722).

186972130 is a wasteful number, since it uses less digits than its factorization.

186972130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18697220.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 186972130 is about 13673.7752650832. The cubic root of 186972130 is about 571.8194961610.

The spelling of 186972130 in words is "one hundred eighty-six million, nine hundred seventy-two thousand, one hundred thirty".