6401893 has 2 divisors, whose sum is σ = 6401894. Its totient is φ = 6401892.

The previous prime is 6401891. The next prime is 6401921. The reversal of 6401893 is 3981046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4809249 + 1592644 = 2193^2 + 1262^2 .

It is a cyclic number.

It is not a de Polignac number, because 6401893 - 2¹ = 6401891 is a prime.

Together with 6401891, it forms a pair of twin primes.

6401893 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6401891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3200946 + 3200947.

It is an arithmetic number, because the mean of its divisors is an integer number (3200947).

Almost surely, 2^6401893 is an apocalyptic number.

It is an amenable number.

6401893 is a deficient number, since it is larger than the sum of its proper divisors (1).

6401893 is an equidigital number, since it uses as much as digits as its factorization.

6401893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 6401893 is about 2530.1962374488. The cubic root of 6401893 is about 185.6818568060.

The spelling of 6401893 in words is "six million, four hundred one thousand, eight hundred ninety-three".