168982691 has 2 divisors, whose sum is σ = 168982692. Its totient is φ = 168982690.

The previous prime is 168982657. The next prime is 168982729. The reversal of 168982691 is 196289861.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 168982691 - 2¹⁸ = 168720547 is a prime.

It is not a weakly prime, because it can be changed into another prime (168982651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84491345 + 84491346.

It is an arithmetic number, because the mean of its divisors is an integer number (84491346).

Almost surely, 2^168982691 is an apocalyptic number.

168982691 is a deficient number, since it is larger than the sum of its proper divisors (1).

168982691 is an equidigital number, since it uses as much as digits as its factorization.

168982691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 50.

The square root of 168982691 is about 12999.3342521838. The cubic root of 168982691 is about 552.8586054644.

The spelling of 168982691 in words is "one hundred sixty-eight million, nine hundred eighty-two thousand, six hundred ninety-one".