138237194 has 12 divisors (see below), whose sum is σ = 209245686. Its totient is φ = 68494272.

The previous prime is 138237193. The next prime is 138237221. The reversal of 138237194 is 491732831.

It can be written as a sum of positive squares in 3 ways, for example, as 18619225 + 119617969 = 4315^2 + 10937^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138237193) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22832 + ... + 28244.

Almost surely, 2^138237194 is an apocalyptic number.

138237194 is a deficient number, since it is larger than the sum of its proper divisors (71008492).

138237194 is an equidigital number, since it uses as much as digits as its factorization.

138237194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5641 (or 5528 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 138237194 is about 11757.4314371805. The cubic root of 138237194 is about 517.0608271212.

The spelling of 138237194 in words is "one hundred thirty-eight million, two hundred thirty-seven thousand, one hundred ninety-four".