3921893 has 2 divisors, whose sum is σ = 3921894. Its totient is φ = 3921892.

The previous prime is 3921881. The next prime is 3921913. The reversal of 3921893 is 3981293.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3912484 + 9409 = 1978^2 + 97^2 .

It is a cyclic number.

It is not a de Polignac number, because 3921893 - 2⁴ = 3921877 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3921823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1960946 + 1960947.

It is an arithmetic number, because the mean of its divisors is an integer number (1960947).

Almost surely, 2^3921893 is an apocalyptic number.

It is an amenable number.

3921893 is a deficient number, since it is larger than the sum of its proper divisors (1).

3921893 is an equidigital number, since it uses as much as digits as its factorization.

3921893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The square root of 3921893 is about 1980.3769843138. The cubic root of 3921893 is about 157.7000799781.

The spelling of 3921893 in words is "three million, nine hundred twenty-one thousand, eight hundred ninety-three".