137393723 has 2 divisors, whose sum is σ = 137393724. Its totient is φ = 137393722.

The previous prime is 137393701. The next prime is 137393759. The reversal of 137393723 is 327393731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 137393723 - 2¹⁰ = 137392699 is a prime.

It is not a weakly prime, because it can be changed into another prime (137393783) by changing a digit.

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, 68696861 + 68696862.

It is an arithmetic number, because the mean of its divisors is an integer number (68696862).

Almost surely, 2^137393723 is an apocalyptic number.

137393723 is a deficient number, since it is larger than the sum of its proper divisors (1).

137393723 is an equidigital number, since it uses as much as digits as its factorization.

137393723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71442, while the sum is 38.

The square root of 137393723 is about 11721.5068570555. The cubic root of 137393723 is about 516.0070445025.

The spelling of 137393723 in words is "one hundred thirty-seven million, three hundred ninety-three thousand, seven hundred twenty-three".