168878851 has 2 divisors, whose sum is σ = 168878852. Its totient is φ = 168878850.

The previous prime is 168878819. The next prime is 168878863. The reversal of 168878851 is 158878861.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168878851 - 2⁵ = 168878819 is a prime.

It is not a weakly prime, because it can be changed into another prime (168878891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84439425 + 84439426.

It is an arithmetic number, because the mean of its divisors is an integer number (84439426).

Almost surely, 2^168878851 is an apocalyptic number.

168878851 is a deficient number, since it is larger than the sum of its proper divisors (1).

168878851 is an equidigital number, since it uses as much as digits as its factorization.

168878851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 860160, while the sum is 52.

The square root of 168878851 is about 12995.3395877137. The cubic root of 168878851 is about 552.7453382406.

The spelling of 168878851 in words is "one hundred sixty-eight million, eight hundred seventy-eight thousand, eight hundred fifty-one".