138875707 has 4 divisors (see below), whose sum is σ = 140250816. Its totient is φ = 137500600.

The previous prime is 138875687. The next prime is 138875713. The reversal of 138875707 is 707578831.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138875707 - 2¹⁵ = 138842939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138875717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 687403 + ... + 687604.

It is an arithmetic number, because the mean of its divisors is an integer number (35062704).

Almost surely, 2^138875707 is an apocalyptic number.

138875707 is a deficient number, since it is larger than the sum of its proper divisors (1375109).

138875707 is a wasteful number, since it uses less digits than its factorization.

138875707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375108.

The product of its (nonzero) digits is 329280, while the sum is 46.

The square root of 138875707 is about 11784.5537463240. The cubic root of 138875707 is about 517.8557001298.

The spelling of 138875707 in words is "one hundred thirty-eight million, eight hundred seventy-five thousand, seven hundred seven".