3921959 has 2 divisors, whose sum is σ = 3921960. Its totient is φ = 3921958.

The previous prime is 3921949. The next prime is 3921971. The reversal of 3921959 is 9591293.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3921959 - 2¹² = 3917863 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3921919) 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, 1960979 + 1960980.

It is an arithmetic number, because the mean of its divisors is an integer number (1960980).

Almost surely, 2^3921959 is an apocalyptic number.

3921959 is a deficient number, since it is larger than the sum of its proper divisors (1).

3921959 is an equidigital number, since it uses as much as digits as its factorization.

3921959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21870, while the sum is 38.

The square root of 3921959 is about 1980.3936477377. The cubic root of 3921959 is about 157.7009645974.

The spelling of 3921959 in words is "three million, nine hundred twenty-one thousand, nine hundred fifty-nine".