4168891 has 2 divisors, whose sum is σ = 4168892. Its totient is φ = 4168890.

The previous prime is 4168889. The next prime is 4168933. The reversal of 4168891 is 1988614.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4168891 - 2¹ = 4168889 is a prime.

Together with 4168889, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 4168891.

It is not a weakly prime, because it can be changed into another prime (4168831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2084445 + 2084446.

It is an arithmetic number, because the mean of its divisors is an integer number (2084446).

Almost surely, 2^4168891 is an apocalyptic number.

4168891 is a deficient number, since it is larger than the sum of its proper divisors (1).

4168891 is an equidigital number, since it uses as much as digits as its factorization.

4168891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 37.

The square root of 4168891 is about 2041.7862277917. The cubic root of 4168891 is about 160.9435266100.

The spelling of 4168891 in words is "four million, one hundred sixty-eight thousand, eight hundred ninety-one".