138874775 has 12 divisors (see below), whose sum is σ = 185451672. Its totient is φ = 102553440.

The previous prime is 138874753. The next prime is 138874777. The reversal of 138874775 is 577478831.

It is a happy number.

138874775 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138874775 - 2⁶ = 138874711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138874777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213329 + ... + 213978.

It is an arithmetic number, because the mean of its divisors is an integer number (15454306).

Almost surely, 2^138874775 is an apocalyptic number.

138874775 is a deficient number, since it is larger than the sum of its proper divisors (46576897).

138874775 is a wasteful number, since it uses less digits than its factorization.

138874775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427330 (or 427325 counting only the distinct ones).

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

The square root of 138874775 is about 11784.5142029699. The cubic root of 138874775 is about 517.8545416777.

It can be divided in two parts, 13 and 8874775, that added together give a palindrome (8874788).

The spelling of 138874775 in words is "one hundred thirty-eight million, eight hundred seventy-four thousand, seven hundred seventy-five".