137438692723 has 2 divisors, whose sum is σ = 137438692724. Its totient is φ = 137438692722.

The previous prime is 137438692691. The next prime is 137438692739. The reversal of 137438692723 is 327296834731.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (327296834731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137438692723 - 2⁵ = 137438692691 is a prime.

It is not a weakly prime, because it can be changed into another prime (137438602723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68719346361 + 68719346362.

It is an arithmetic number, because the mean of its divisors is an integer number (68719346362).

Almost surely, 2^137438692723 is an apocalyptic number.

137438692723 is a deficient number, since it is larger than the sum of its proper divisors (1).

137438692723 is an equidigital number, since it uses as much as digits as its factorization.

137438692723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9144576, while the sum is 55.

The spelling of 137438692723 in words is "one hundred thirty-seven billion, four hundred thirty-eight million, six hundred ninety-two thousand, seven hundred twenty-three".