168918143 has 2 divisors, whose sum is σ = 168918144. Its totient is φ = 168918142.

The previous prime is 168918119. The next prime is 168918161. The reversal of 168918143 is 341819861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168918143 - 2⁸ = 168917887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 168918143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168914143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84459071 + 84459072.

It is an arithmetic number, because the mean of its divisors is an integer number (84459072).

Almost surely, 2^168918143 is an apocalyptic number.

168918143 is a deficient number, since it is larger than the sum of its proper divisors (1).

168918143 is an equidigital number, since it uses as much as digits as its factorization.

168918143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 41.

The square root of 168918143 is about 12996.8512725198. The cubic root of 168918143 is about 552.7882028652.

The spelling of 168918143 in words is "one hundred sixty-eight million, nine hundred eighteen thousand, one hundred forty-three".