186981113 has 16 divisors (see below), whose sum is σ = 216748224. Its totient is φ = 159413760.

The previous prime is 186981083. The next prime is 186981149. The reversal of 186981113 is 311189681.

It is not a de Polignac number, because 186981113 - 2¹⁸ = 186718969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (186981163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55781 + ... + 59037.

It is an arithmetic number, because the mean of its divisors is an integer number (13546764).

Almost surely, 2^186981113 is an apocalyptic number.

It is an amenable number.

186981113 is a deficient number, since it is larger than the sum of its proper divisors (29767111).

186981113 is a wasteful number, since it uses less digits than its factorization.

186981113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3592.

The product of its digits is 10368, while the sum is 38.

The square root of 186981113 is about 13674.1037366257. The cubic root of 186981113 is about 571.8286536261.

The spelling of 186981113 in words is "one hundred eighty-six million, nine hundred eighty-one thousand, one hundred thirteen".