137698919 has 2 divisors, whose sum is σ = 137698920. Its totient is φ = 137698918.

The previous prime is 137698877. The next prime is 137698921. The reversal of 137698919 is 919896731.

137698919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137698919 - 2⁸ = 137698663 is a prime.

It is a super-2 number, since 2×137698919² = 37921984587537122, which contains 22 as substring.

Together with 137698921, 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 (137698819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68849459 + 68849460.

It is an arithmetic number, because the mean of its divisors is an integer number (68849460).

Almost surely, 2^137698919 is an apocalyptic number.

137698919 is a deficient number, since it is larger than the sum of its proper divisors (1).

137698919 is an equidigital number, since it uses as much as digits as its factorization.

137698919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832, while the sum is 53.

The square root of 137698919 is about 11734.5182687659. The cubic root of 137698919 is about 516.3888349246.

The spelling of 137698919 in words is "one hundred thirty-seven million, six hundred ninety-eight thousand, nine hundred nineteen".