138125982 has 8 divisors (see below), whose sum is σ = 276251976. Its totient is φ = 46041992.

The previous prime is 138125951. The next prime is 138125983. The reversal of 138125982 is 289521831.

138125982 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

138125982 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 138125982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138125983) 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, 11510493 + ... + 11510504.

It is an arithmetic number, because the mean of its divisors is an integer number (34531497).

Almost surely, 2^138125982 is an apocalyptic number.

138125982 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.

138125982 is a wasteful number, since it uses less digits than its factorization.

138125982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23021002.

The product of its digits is 34560, while the sum is 39.

The square root of 138125982 is about 11752.7010512478. The cubic root of 138125982 is about 516.9221312212.

The spelling of 138125982 in words is "one hundred thirty-eight million, one hundred twenty-five thousand, nine hundred eighty-two".