168994153 has 2 divisors, whose sum is σ = 168994154. Its totient is φ = 168994152.

The previous prime is 168994141. The next prime is 168994159. The reversal of 168994153 is 351499861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154455184 + 14538969 = 12428^2 + 3813^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168994153 is a prime.

It is equal to p_9449893 and since 168994153 and 9449893 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (168994159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84497076 + 84497077.

It is an arithmetic number, because the mean of its divisors is an integer number (84497077).

Almost surely, 2^168994153 is an apocalyptic number.

It is an amenable number.

168994153 is a deficient number, since it is larger than the sum of its proper divisors (1).

168994153 is an equidigital number, since it uses as much as digits as its factorization.

168994153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 46.

The square root of 168994153 is about 12999.7751134395. The cubic root of 168994153 is about 552.8711052103.

The spelling of 168994153 in words is "one hundred sixty-eight million, nine hundred ninety-four thousand, one hundred fifty-three".