138111723 has 48 divisors (see below), whose sum is σ = 222768000. Its totient is φ = 85193856.

The previous prime is 138111707. The next prime is 138111731. The reversal of 138111723 is 327111831.

It is a happy number.

It is not a de Polignac number, because 138111723 - 2⁴ = 138111707 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (138111023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 276528 + ... + 277026.

It is an arithmetic number, because the mean of its divisors is an integer number (4641000).

Almost surely, 2^138111723 is an apocalyptic number.

138111723 is a deficient number, since it is larger than the sum of its proper divisors (84656277).

138111723 is an equidigital number, since it uses as much as digits as its factorization.

138111723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598 (or 586 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 138111723 is about 11752.0944090830. The cubic root of 138111723 is about 516.9043430005.

The spelling of 138111723 in words is "one hundred thirty-eight million, one hundred eleven thousand, seven hundred twenty-three".