168920847 has 12 divisors (see below), whose sum is σ = 244324080. Its totient is φ = 112462848.

The previous prime is 168920839. The next prime is 168920879. The reversal of 168920847 is 748029861.

It is not a de Polignac number, because 168920847 - 2³ = 168920839 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168920827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5283 + ... + 19124.

It is an arithmetic number, because the mean of its divisors is an integer number (20360340).

Almost surely, 2^168920847 is an apocalyptic number.

168920847 is a deficient number, since it is larger than the sum of its proper divisors (75403233).

168920847 is a wasteful number, since it uses less digits than its factorization.

168920847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25182 (or 25179 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 168920847 is about 12996.9552972994. The cubic root of 168920847 is about 552.7911524819.

The spelling of 168920847 in words is "one hundred sixty-eight million, nine hundred twenty thousand, eight hundred forty-seven".