138015707 has 12 divisors (see below), whose sum is σ = 147065280. Its totient is φ = 129495936.

The previous prime is 138015701. The next prime is 138015739. The reversal of 138015707 is 707510831.

It is not a de Polignac number, because 138015707 - 2⁶ = 138015643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138015701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137933 + ... + 138929.

It is an arithmetic number, because the mean of its divisors is an integer number (12255440).

Almost surely, 2^138015707 is an apocalyptic number.

138015707 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

138015707 is a deficient number, since it is larger than the sum of its proper divisors (9049573).

138015707 is an equidigital number, since it uses as much as digits as its factorization.

138015707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510 (or 1493 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 138015707 is about 11748.0086397653. The cubic root of 138015707 is about 516.7845303541.

The spelling of 138015707 in words is "one hundred thirty-eight million, fifteen thousand, seven hundred seven".