168698137 has 2 divisors, whose sum is σ = 168698138. Its totient is φ = 168698136.

The previous prime is 168698129. The next prime is 168698147. The reversal of 168698137 is 731896861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141824281 + 26873856 = 11909^2 + 5184^2 .

It is an emirp because it is prime and its reverse (731896861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168698137 - 2³ = 168698129 is a prime.

It is a super-2 number, since 2×168698137² = 56918122854541538, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (168698147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84349068 + 84349069.

It is an arithmetic number, because the mean of its divisors is an integer number (84349069).

Almost surely, 2^168698137 is an apocalyptic number.

It is an amenable number.

168698137 is a deficient number, since it is larger than the sum of its proper divisors (1).

168698137 is an equidigital number, since it uses as much as digits as its factorization.

168698137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 49.

The square root of 168698137 is about 12988.3846955655. The cubic root of 168698137 is about 552.5481071656.

The spelling of 168698137 in words is "one hundred sixty-eight million, six hundred ninety-eight thousand, one hundred thirty-seven".