138368723 has 2 divisors, whose sum is σ = 138368724. Its totient is φ = 138368722.

The previous prime is 138368683. The next prime is 138368753. The reversal of 138368723 is 327863831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138368723 - 2¹⁰ = 138367699 is a prime.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (138368753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69184361 + 69184362.

It is an arithmetic number, because the mean of its divisors is an integer number (69184362).

Almost surely, 2^138368723 is an apocalyptic number.

138368723 is a deficient number, since it is larger than the sum of its proper divisors (1).

138368723 is an equidigital number, since it uses as much as digits as its factorization.

138368723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The square root of 138368723 is about 11763.0235483909. The cubic root of 138368723 is about 517.2247649962.

The spelling of 138368723 in words is "one hundred thirty-eight million, three hundred sixty-eight thousand, seven hundred twenty-three".