168464389 has 2 divisors, whose sum is σ = 168464390. Its totient is φ = 168464388.

The previous prime is 168464381. The next prime is 168464437. The reversal of 168464389 is 983464861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160528900 + 7935489 = 12670^2 + 2817^2 .

It is a cyclic number.

It is not a de Polignac number, because 168464389 - 2³ = 168464381 is a prime.

It is a super-2 number, since 2×168464389² = 56760500722286642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168464381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84232194 + 84232195.

It is an arithmetic number, because the mean of its divisors is an integer number (84232195).

Almost surely, 2^168464389 is an apocalyptic number.

It is an amenable number.

168464389 is a deficient number, since it is larger than the sum of its proper divisors (1).

168464389 is an equidigital number, since it uses as much as digits as its factorization.

168464389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 49.

The square root of 168464389 is about 12979.3832287979. The cubic root of 168464389 is about 552.2927858039.

The spelling of 168464389 in words is "one hundred sixty-eight million, four hundred sixty-four thousand, three hundred eighty-nine".