186970138 has 8 divisors (see below), whose sum is σ = 280585620. Its totient is φ = 93441600.

The previous prime is 186970129. The next prime is 186970159. The reversal of 186970138 is 831079681.

It can be written as a sum of positive squares in 2 ways, for example, as 185313769 + 1656369 = 13613^2 + 1287^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 186970094 and 186970103.

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, 16063 + ... + 25138.

Almost surely, 2^186970138 is an apocalyptic number.

186970138 is a deficient number, since it is larger than the sum of its proper divisors (93615482).

186970138 is a wasteful number, since it uses less digits than its factorization.

186970138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43472.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 186970138 is about 13673.7024247275. The cubic root of 186970138 is about 571.8174654332.

The spelling of 186970138 in words is "one hundred eighty-six million, nine hundred seventy thousand, one hundred thirty-eight".