3993091 has 2 divisors, whose sum is σ = 3993092. Its totient is φ = 3993090.

The previous prime is 3993089. The next prime is 3993103. The reversal of 3993091 is 1903993.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3993091 - 2¹ = 3993089 is a prime.

Together with 3993089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3993071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1996545 + 1996546.

It is an arithmetic number, because the mean of its divisors is an integer number (1996546).

Almost surely, 2^3993091 is an apocalyptic number.

3993091 is a deficient number, since it is larger than the sum of its proper divisors (1).

3993091 is an equidigital number, since it uses as much as digits as its factorization.

3993091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6561, while the sum is 34.

The square root of 3993091 is about 1998.2720035070. The cubic root of 3993091 is about 158.6486579103.

The spelling of 3993091 in words is "three million, nine hundred ninety-three thousand, ninety-one".