138774875 has 16 divisors (see below), whose sum is σ = 174376800. Its totient is φ = 110260000.

The previous prime is 138774871. The next prime is 138774943. The reversal of 138774875 is 578477831.

It is a happy number.

It is not a de Polignac number, because 138774875 - 2² = 138774871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138774871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14900 + ... + 22350.

It is an arithmetic number, because the mean of its divisors is an integer number (10898550).

Almost surely, 2^138774875 is an apocalyptic number.

138774875 is a deficient number, since it is larger than the sum of its proper divisors (35601925).

138774875 is an equidigital number, since it uses as much as digits as its factorization.

138774875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7615 (or 7605 counting only the distinct ones).

The product of its digits is 1317120, while the sum is 50.

The square root of 138774875 is about 11780.2748270149. The cubic root of 138774875 is about 517.7303384675.

The spelling of 138774875 in words is "one hundred thirty-eight million, seven hundred seventy-four thousand, eight hundred seventy-five".