138273375 has 16 divisors (see below), whose sum is σ = 230087520. Its totient is φ = 73745600.

The previous prime is 138273371. The next prime is 138273379. The reversal of 138273375 is 573372831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (138273371) and next prime (138273379).

It is not a de Polignac number, because 138273375 - 2² = 138273371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138273371) 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, 183990 + ... + 184739.

It is an arithmetic number, because the mean of its divisors is an integer number (14380470).

Almost surely, 2^138273375 is an apocalyptic number.

138273375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138273375 is a deficient number, since it is larger than the sum of its proper divisors (91814145).

138273375 is an equidigital number, since it uses as much as digits as its factorization.

138273375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368747 (or 368737 counting only the distinct ones).

The product of its digits is 105840, while the sum is 39.

The square root of 138273375 is about 11758.9699804022. The cubic root of 138273375 is about 517.1059335197.

The spelling of 138273375 in words is "one hundred thirty-eight million, two hundred seventy-three thousand, three hundred seventy-five".