138547974 has 8 divisors (see below), whose sum is σ = 277095960. Its totient is φ = 46182656.

The previous prime is 138547973. The next prime is 138548023. The reversal of 138547974 is 479745831.

It is a happy number.

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

138547974 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138547973) 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, 11545659 + ... + 11545670.

It is an arithmetic number, because the mean of its divisors is an integer number (34636995).

Almost surely, 2^138547974 is an apocalyptic number.

138547974 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138547974 is a wasteful number, since it uses less digits than its factorization.

138547974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23091334.

The product of its digits is 846720, while the sum is 48.

The square root of 138547974 is about 11770.6403394208. The cubic root of 138547974 is about 517.4480164358.

The spelling of 138547974 in words is "one hundred thirty-eight million, five hundred forty-seven thousand, nine hundred seventy-four".