168920859 has 4 divisors (see below), whose sum is σ = 225227816. Its totient is φ = 112613904.

The previous prime is 168920839. The next prime is 168920879. The reversal of 168920859 is 958029861.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (168920839) and next prime (168920879).

It is not a de Polignac number, because 168920859 - 2⁵ = 168920827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168920819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28153474 + ... + 28153479.

It is an arithmetic number, because the mean of its divisors is an integer number (56306954).

Almost surely, 2^168920859 is an apocalyptic number.

168920859 is a deficient number, since it is larger than the sum of its proper divisors (56306957).

168920859 is an equidigital number, since it uses as much as digits as its factorization.

168920859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56306956.

The product of its (nonzero) digits is 311040, while the sum is 48.

The square root of 168920859 is about 12996.9557589460. The cubic root of 168920859 is about 552.7911655719.

The spelling of 168920859 in words is "one hundred sixty-eight million, nine hundred twenty thousand, eight hundred fifty-nine".