168682489 has 2 divisors, whose sum is σ = 168682490. Its totient is φ = 168682488.

The previous prime is 168682469. The next prime is 168682523. The reversal of 168682489 is 984286861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111936400 + 56746089 = 10580^2 + 7533^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168682489 is a prime.

It is not a weakly prime, because it can be changed into another prime (168682469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84341244 + 84341245.

It is an arithmetic number, because the mean of its divisors is an integer number (84341245).

Almost surely, 2^168682489 is an apocalyptic number.

It is an amenable number.

168682489 is a deficient number, since it is larger than the sum of its proper divisors (1).

168682489 is an equidigital number, since it uses as much as digits as its factorization.

168682489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1327104, while the sum is 52.

The square root of 168682489 is about 12987.7822972207. The cubic root of 168682489 is about 552.5310223294.

The spelling of 168682489 in words is "one hundred sixty-eight million, six hundred eighty-two thousand, four hundred eighty-nine".