137994218 has 8 divisors (see below), whose sum is σ = 208890660. Its totient is φ = 68364000.

The previous prime is 137994217. The next prime is 137994229. The reversal of 137994218 is 812499731.

It can be written as a sum of positive squares in 2 ways, for example, as 137992009 + 2209 = 11747^2 + 47^2 .

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

It is not an unprimeable number, because it can be changed into a prime (137994217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316283 + ... + 316718.

Almost surely, 2^137994218 is an apocalyptic number.

137994218 is a deficient number, since it is larger than the sum of its proper divisors (70896442).

137994218 is a wasteful number, since it uses less digits than its factorization.

137994218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633112.

The product of its digits is 108864, while the sum is 44.

The square root of 137994218 is about 11747.0940236298. The cubic root of 137994218 is about 516.7577079018.

The spelling of 137994218 in words is "one hundred thirty-seven million, nine hundred ninety-four thousand, two hundred eighteen".