168989651 has 2 divisors, whose sum is σ = 168989652. Its totient is φ = 168989650.

The previous prime is 168989609. The next prime is 168989683. The reversal of 168989651 is 156989861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168989651 - 2²² = 164795347 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 168989593 and 168989602.

It is not a weakly prime, because it can be changed into another prime (168989251) 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, 84494825 + 84494826.

It is an arithmetic number, because the mean of its divisors is an integer number (84494826).

Almost surely, 2^168989651 is an apocalyptic number.

168989651 is a deficient number, since it is larger than the sum of its proper divisors (1).

168989651 is an equidigital number, since it uses as much as digits as its factorization.

168989651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 53.

The square root of 168989651 is about 12999.6019554446. The cubic root of 168989651 is about 552.8661956759.

The spelling of 168989651 in words is "one hundred sixty-eight million, nine hundred eighty-nine thousand, six hundred fifty-one".