3591631 has 2 divisors, whose sum is σ = 3591632. Its totient is φ = 3591630.

The previous prime is 3591613. The next prime is 3591649. The reversal of 3591631 is 1361953.

Together with previous prime (3591613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (3591613) and next prime (3591649).

It is an emirp because it is prime and its reverse (1361953) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3591631 - 2⁷ = 3591503 is a prime.

It is a super-2 number, since 2×3591631² = 25799626480322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3591631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3591671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1795815 + 1795816.

It is an arithmetic number, because the mean of its divisors is an integer number (1795816).

Almost surely, 2^3591631 is an apocalyptic number.

3591631 is a deficient number, since it is larger than the sum of its proper divisors (1).

3591631 is an equidigital number, since it uses as much as digits as its factorization.

3591631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2430, while the sum is 28.

The square root of 3591631 is about 1895.1598877140. The cubic root of 3591631 is about 153.1430305576.

The spelling of 3591631 in words is "three million, five hundred ninety-one thousand, six hundred thirty-one".