4183891 has 2 divisors, whose sum is σ = 4183892. Its totient is φ = 4183890.

The previous prime is 4183889. The next prime is 4183897. The reversal of 4183891 is 1983814.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4183891 - 2¹ = 4183889 is a prime.

Together with 4183889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4183897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2091945 + 2091946.

It is an arithmetic number, because the mean of its divisors is an integer number (2091946).

Almost surely, 2^4183891 is an apocalyptic number.

4183891 is a deficient number, since it is larger than the sum of its proper divisors (1).

4183891 is an equidigital number, since it uses as much as digits as its factorization.

4183891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 34.

The square root of 4183891 is about 2045.4561838377. The cubic root of 4183891 is about 161.1363247455.

The spelling of 4183891 in words is "four million, one hundred eighty-three thousand, eight hundred ninety-one".