168901643 has 2 divisors, whose sum is σ = 168901644. Its totient is φ = 168901642.

The previous prime is 168901639. The next prime is 168901661. The reversal of 168901643 is 346109861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 168901643 - 2² = 168901639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 168901597 and 168901606.

It is not a weakly prime, because it can be changed into another prime (168903643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84450821 + 84450822.

It is an arithmetic number, because the mean of its divisors is an integer number (84450822).

Almost surely, 2^168901643 is an apocalyptic number.

168901643 is a deficient number, since it is larger than the sum of its proper divisors (1).

168901643 is an equidigital number, since it uses as much as digits as its factorization.

168901643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 168901643 is about 12996.2164878860. The cubic root of 168901643 is about 552.7702034126.

The spelling of 168901643 in words is "one hundred sixty-eight million, nine hundred one thousand, six hundred forty-three".