168998743 has 2 divisors, whose sum is σ = 168998744. Its totient is φ = 168998742.

The previous prime is 168998693. The next prime is 168998789. The reversal of 168998743 is 347899861.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168998743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168993743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84499371 + 84499372.

It is an arithmetic number, because the mean of its divisors is an integer number (84499372).

Almost surely, 2^168998743 is an apocalyptic number.

168998743 is a deficient number, since it is larger than the sum of its proper divisors (1).

168998743 is an equidigital number, since it uses as much as digits as its factorization.

168998743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 55.

The square root of 168998743 is about 12999.9516537563. The cubic root of 168998743 is about 552.8761106209.

The spelling of 168998743 in words is "one hundred sixty-eight million, nine hundred ninety-eight thousand, seven hundred forty-three".