137842186 has 4 divisors (see below), whose sum is σ = 206763282. Its totient is φ = 68921092.

The previous prime is 137842181. The next prime is 137842193. The reversal of 137842186 is 681248731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 681248731 = 151 ⋅4511581.

It can be written as a sum of positive squares in only one way, i.e., 83156161 + 54686025 = 9119^2 + 7395^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (137842181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34460545 + ... + 34460548.

Almost surely, 2^137842186 is an apocalyptic number.

137842186 is a deficient number, since it is larger than the sum of its proper divisors (68921096).

137842186 is an equidigital number, since it uses as much as digits as its factorization.

137842186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68921095.

The product of its digits is 64512, while the sum is 40.

The square root of 137842186 is about 11740.6211931056. The cubic root of 137842186 is about 516.5678628039.

The spelling of 137842186 in words is "one hundred thirty-seven million, eight hundred forty-two thousand, one hundred eighty-six".