168740851 has 2 divisors, whose sum is σ = 168740852. Its totient is φ = 168740850.

The previous prime is 168740849. The next prime is 168740867. The reversal of 168740851 is 158047861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 168740851 - 2¹ = 168740849 is a prime.

Together with 168740849, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (168740651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84370425 + 84370426.

It is an arithmetic number, because the mean of its divisors is an integer number (84370426).

Almost surely, 2^168740851 is an apocalyptic number.

168740851 is a deficient number, since it is larger than the sum of its proper divisors (1).

168740851 is an equidigital number, since it uses as much as digits as its factorization.

168740851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 168740851 is about 12990.0289068193. The cubic root of 168740851 is about 552.5947378884.

The spelling of 168740851 in words is "one hundred sixty-eight million, seven hundred forty thousand, eight hundred fifty-one".