3568991 has 2 divisors, whose sum is σ = 3568992. Its totient is φ = 3568990.

The previous prime is 3568973. The next prime is 3568993. The reversal of 3568991 is 1998653.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3568991 - 2¹⁸ = 3306847 is a prime.

Together with 3568993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3568993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1784495 + 1784496.

It is an arithmetic number, because the mean of its divisors is an integer number (1784496).

Almost surely, 2^3568991 is an apocalyptic number.

3568991 is a deficient number, since it is larger than the sum of its proper divisors (1).

3568991 is an equidigital number, since it uses as much as digits as its factorization.

3568991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 41.

The square root of 3568991 is about 1889.1773341854. The cubic root of 3568991 is about 152.8205708396.

The spelling of 3568991 in words is "three million, five hundred sixty-eight thousand, nine hundred ninety-one".