138437974 has 8 divisors (see below), whose sum is σ = 209673360. Its totient is φ = 68546856.

The previous prime is 138437963. The next prime is 138437977. The reversal of 138437974 is 479734831.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138437977) 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, 335809 + ... + 336220.

It is an arithmetic number, because the mean of its divisors is an integer number (26209170).

Almost surely, 2^138437974 is an apocalyptic number.

138437974 is a deficient number, since it is larger than the sum of its proper divisors (71235386).

138437974 is a wasteful number, since it uses less digits than its factorization.

138437974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672134.

The product of its digits is 508032, while the sum is 46.

The square root of 138437974 is about 11765.9667686085. The cubic root of 138437974 is about 517.3110377646.

The spelling of 138437974 in words is "one hundred thirty-eight million, four hundred thirty-seven thousand, nine hundred seventy-four".