138011726 has 4 divisors (see below), whose sum is σ = 207017592. Its totient is φ = 69005862.

The previous prime is 138011711. The next prime is 138011737. The reversal of 138011726 is 627110831.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 34502930 + ... + 34502933.

It is an arithmetic number, because the mean of its divisors is an integer number (51754398).

Almost surely, 2^138011726 is an apocalyptic number.

138011726 is a deficient number, since it is larger than the sum of its proper divisors (69005866).

138011726 is an equidigital number, since it uses as much as digits as its factorization.

138011726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69005865.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 138011726 is about 11747.8392055731. The cubic root of 138011726 is about 516.7795615018.

The spelling of 138011726 in words is "one hundred thirty-eight million, eleven thousand, seven hundred twenty-six".