137931623 has 2 divisors, whose sum is σ = 137931624. Its totient is φ = 137931622.

The previous prime is 137931601. The next prime is 137931649. The reversal of 137931623 is 326139731.

137931623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137931623 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137931823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68965811 + 68965812.

It is an arithmetic number, because the mean of its divisors is an integer number (68965812).

Almost surely, 2^137931623 is an apocalyptic number.

137931623 is a deficient number, since it is larger than the sum of its proper divisors (1).

137931623 is an equidigital number, since it uses as much as digits as its factorization.

137931623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20412, while the sum is 35.

The square root of 137931623 is about 11744.4294454861. The cubic root of 137931623 is about 516.6795612922.

The spelling of 137931623 in words is "one hundred thirty-seven million, nine hundred thirty-one thousand, six hundred twenty-three".