190686137 has 2 divisors, whose sum is σ = 190686138. Its totient is φ = 190686136.

The previous prime is 190686131. The next prime is 190686163. The reversal of 190686137 is 731686091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137264656 + 53421481 = 11716^2 + 7309^2 .

It is an emirp because it is prime and its reverse (731686091) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190686137 is a prime.

It is a super-2 number, since 2×190686137² = 72722405687965538, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 190686094 and 190686103.

It is not a weakly prime, because it can be changed into another prime (190686131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95343068 + 95343069.

It is an arithmetic number, because the mean of its divisors is an integer number (95343069).

Almost surely, 2^190686137 is an apocalyptic number.

It is an amenable number.

190686137 is a deficient number, since it is larger than the sum of its proper divisors (1).

190686137 is an equidigital number, since it uses as much as digits as its factorization.

190686137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 190686137 is about 13808.9151275544. The cubic root of 190686137 is about 575.5808995213.

The spelling of 190686137 in words is "one hundred ninety million, six hundred eighty-six thousand, one hundred thirty-seven".