138763753 has 4 divisors (see below), whose sum is σ = 143548740. Its totient is φ = 133978768.

The previous prime is 138763747. The next prime is 138763769. The reversal of 138763753 is 357367831.

138763753 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30437289 + 108326464 = 5517^2 + 10408^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138763753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138763553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2392450 + ... + 2392507.

It is an arithmetic number, because the mean of its divisors is an integer number (35887185).

Almost surely, 2^138763753 is an apocalyptic number.

It is an amenable number.

138763753 is a deficient number, since it is larger than the sum of its proper divisors (4784987).

138763753 is an equidigital number, since it uses as much as digits as its factorization.

138763753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4784986.

The product of its digits is 317520, while the sum is 43.

The square root of 138763753 is about 11779.8027572621. The cubic root of 138763753 is about 517.7165070717.

The spelling of 138763753 in words is "one hundred thirty-eight million, seven hundred sixty-three thousand, seven hundred fifty-three".