137996917 has 2 divisors, whose sum is σ = 137996918. Its totient is φ = 137996916.

The previous prime is 137996897. The next prime is 137996983. The reversal of 137996917 is 719699731.

137996917 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 can be written as a sum of positive squares in only one way, i.e., 101888836 + 36108081 = 10094^2 + 6009^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137996917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137996017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68998458 + 68998459.

It is an arithmetic number, because the mean of its divisors is an integer number (68998459).

Almost surely, 2^137996917 is an apocalyptic number.

It is an amenable number.

137996917 is a deficient number, since it is larger than the sum of its proper divisors (1).

137996917 is an equidigital number, since it uses as much as digits as its factorization.

137996917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 642978, while the sum is 52.

The square root of 137996917 is about 11747.2089025436. The cubic root of 137996917 is about 516.7610769317.

The spelling of 137996917 in words is "one hundred thirty-seven million, nine hundred ninety-six thousand, nine hundred seventeen".