137688911 has 2 divisors, whose sum is σ = 137688912. Its totient is φ = 137688910.

The previous prime is 137688857. The next prime is 137688913. The reversal of 137688911 is 119886731.

It is a strong prime.

It is an emirp because it is prime and its reverse (119886731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137688911 - 2¹⁴ = 137672527 is a prime.

Together with 137688913, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137688913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68844455 + 68844456.

It is an arithmetic number, because the mean of its divisors is an integer number (68844456).

Almost surely, 2^137688911 is an apocalyptic number.

137688911 is a deficient number, since it is larger than the sum of its proper divisors (1).

137688911 is an equidigital number, since it uses as much as digits as its factorization.

137688911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 44.

The square root of 137688911 is about 11734.0918268096. The cubic root of 137688911 is about 516.3763241881.

The spelling of 137688911 in words is "one hundred thirty-seven million, six hundred eighty-eight thousand, nine hundred eleven".