138103751 has 4 divisors (see below), whose sum is σ = 138150072. Its totient is φ = 138057432.

The previous prime is 138103747. The next prime is 138103781. The reversal of 138103751 is 157301831.

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 138103751 - 2² = 138103747 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 (138103711) 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, 18356 + ... + 24761.

It is an arithmetic number, because the mean of its divisors is an integer number (34537518).

Almost surely, 2^138103751 is an apocalyptic number.

138103751 is a deficient number, since it is larger than the sum of its proper divisors (46321).

138103751 is an equidigital number, since it uses as much as digits as its factorization.

138103751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46320.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 138103751 is about 11751.7552306028. The cubic root of 138103751 is about 516.8943973309.

The spelling of 138103751 in words is "one hundred thirty-eight million, one hundred three thousand, seven hundred fifty-one".