137839216517 has 2 divisors, whose sum is σ = 137839216518. Its totient is φ = 137839216516.

The previous prime is 137839216483. The next prime is 137839216579. The reversal of 137839216517 is 715612938731.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132826718116 + 5012498401 = 364454^2 + 70799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137839216517 is a prime.

It is a super-2 number, since 2×137839216517² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137839216597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68919608258 + 68919608259.

It is an arithmetic number, because the mean of its divisors is an integer number (68919608259).

Almost surely, 2^137839216517 is an apocalyptic number.

It is an amenable number.

137839216517 is a deficient number, since it is larger than the sum of its proper divisors (1).

137839216517 is an equidigital number, since it uses as much as digits as its factorization.

137839216517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 53.

The spelling of 137839216517 in words is "one hundred thirty-seven billion, eight hundred thirty-nine million, two hundred sixteen thousand, five hundred seventeen".