137660191 has 2 divisors, whose sum is σ = 137660192. Its totient is φ = 137660190.

The previous prime is 137660189. The next prime is 137660213. The reversal of 137660191 is 191066731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 137660191 - 2¹ = 137660189 is a prime.

Together with 137660189, it forms a pair of twin primes.

It is equal to p_7787500 and since 137660191 and 7787500 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137660161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68830095 + 68830096.

It is an arithmetic number, because the mean of its divisors is an integer number (68830096).

Almost surely, 2^137660191 is an apocalyptic number.

137660191 is a deficient number, since it is larger than the sum of its proper divisors (1).

137660191 is an equidigital number, since it uses as much as digits as its factorization.

137660191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 137660191 is about 11732.8679784612. The cubic root of 137660191 is about 516.3404187082.

The spelling of 137660191 in words is "one hundred thirty-seven million, six hundred sixty thousand, one hundred ninety-one".