168538857 has 4 divisors (see below), whose sum is σ = 224718480. Its totient is φ = 112359236.

The previous prime is 168538841. The next prime is 168538859. The reversal of 168538857 is 758835861.

168538857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 168538857 - 2⁴ = 168538841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168538859) 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, 28089807 + ... + 28089812.

It is an arithmetic number, because the mean of its divisors is an integer number (56179620).

Almost surely, 2^168538857 is an apocalyptic number.

It is an amenable number.

168538857 is a deficient number, since it is larger than the sum of its proper divisors (56179623).

168538857 is an equidigital number, since it uses as much as digits as its factorization.

168538857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56179622.

The product of its digits is 1612800, while the sum is 51.

The square root of 168538857 is about 12982.2516151860. The cubic root of 168538857 is about 552.3741523186.

The spelling of 168538857 in words is "one hundred sixty-eight million, five hundred thirty-eight thousand, eight hundred fifty-seven".