138750757 has 4 divisors (see below), whose sum is σ = 138797280. Its totient is φ = 138704236.

The previous prime is 138750751. The next prime is 138750793. The reversal of 138750757 is 757057831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 757057831 = 19 ⋅39845149.

It is a cyclic number.

It is not a de Polignac number, because 138750757 - 2²³ = 130362149 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 (138750751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18457 + ... + 24862.

It is an arithmetic number, because the mean of its divisors is an integer number (34699320).

Almost surely, 2^138750757 is an apocalyptic number.

It is an amenable number.

138750757 is a deficient number, since it is larger than the sum of its proper divisors (46523).

138750757 is an equidigital number, since it uses as much as digits as its factorization.

138750757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46522.

The product of its (nonzero) digits is 205800, while the sum is 43.

The square root of 138750757 is about 11779.2511222064. The cubic root of 138750757 is about 517.7003442203.

The spelling of 138750757 in words is "one hundred thirty-eight million, seven hundred fifty thousand, seven hundred fifty-seven".