168979871 has 2 divisors, whose sum is σ = 168979872. Its totient is φ = 168979870.

The previous prime is 168979849. The next prime is 168979883. The reversal of 168979871 is 178979861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168979871 - 2¹⁰ = 168978847 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168979831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84489935 + 84489936.

It is an arithmetic number, because the mean of its divisors is an integer number (84489936).

Almost surely, 2^168979871 is an apocalyptic number.

168979871 is a deficient number, since it is larger than the sum of its proper divisors (1).

168979871 is an equidigital number, since it uses as much as digits as its factorization.

168979871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 56.

The square root of 168979871 is about 12999.2257846381. The cubic root of 168979871 is about 552.8555300608.

The spelling of 168979871 in words is "one hundred sixty-eight million, nine hundred seventy-nine thousand, eight hundred seventy-one".