138017775 has 48 divisors (see below), whose sum is σ = 262665728. Its totient is φ = 62640000.

The previous prime is 138017753. The next prime is 138017791. The reversal of 138017775 is 577710831.

It is not a de Polignac number, because 138017775 - 2⁸ = 138017519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 78405 + ... + 80145.

Almost surely, 2^138017775 is an apocalyptic number.

138017775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138017775 is a deficient number, since it is larger than the sum of its proper divisors (124647953).

138017775 is a wasteful number, since it uses less digits than its factorization.

138017775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912 (or 1907 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 39.

The square root of 138017775 is about 11748.0966543521. The cubic root of 138017775 is about 516.7871114736.

The spelling of 138017775 in words is "one hundred thirty-eight million, seventeen thousand, seven hundred seventy-five".