138437594 has 8 divisors (see below), whose sum is σ = 207769620. Its totient is φ = 69181056.

The previous prime is 138437587. The next prime is 138437603. The reversal of 138437594 is 495734831.

It can be written as a sum of positive squares in 2 ways, for example, as 137194369 + 1243225 = 11713^2 + 1115^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14039 + ... + 21770.

Almost surely, 2^138437594 is an apocalyptic number.

138437594 is a deficient number, since it is larger than the sum of its proper divisors (69332026).

138437594 is a wasteful number, since it uses less digits than its factorization.

138437594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37744.

The product of its digits is 362880, while the sum is 44.

The square root of 138437594 is about 11765.9506203281. The cubic root of 138437594 is about 517.3105644398.

The spelling of 138437594 in words is "one hundred thirty-eight million, four hundred thirty-seven thousand, five hundred ninety-four".