138361375 has 8 divisors (see below), whose sum is σ = 172675152. Its totient is φ = 110689000.

The previous prime is 138361367. The next prime is 138361387. The reversal of 138361375 is 573163831.

It is a happy number.

It is not a de Polignac number, because 138361375 - 2³ = 138361367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 553321 + ... + 553570.

It is an arithmetic number, because the mean of its divisors is an integer number (21584394).

Almost surely, 2^138361375 is an apocalyptic number.

138361375 is a deficient number, since it is larger than the sum of its proper divisors (34313777).

138361375 is an equidigital number, since it uses as much as digits as its factorization.

138361375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106906 (or 1106896 counting only the distinct ones).

The product of its digits is 45360, while the sum is 37.

The square root of 138361375 is about 11762.7112095809. The cubic root of 138361375 is about 517.2156091823.

The spelling of 138361375 in words is "one hundred thirty-eight million, three hundred sixty-one thousand, three hundred seventy-five".