3649831 has 2 divisors, whose sum is σ = 3649832. Its totient is φ = 3649830.

The previous prime is 3649777. The next prime is 3649871. The reversal of 3649831 is 1389463.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3649831 - 2¹⁵ = 3617063 is a prime.

It is a super-2 number, since 2×3649831² = 26642532657122, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3649871) 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, 1824915 + 1824916.

It is an arithmetic number, because the mean of its divisors is an integer number (1824916).

Almost surely, 2^3649831 is an apocalyptic number.

3649831 is a deficient number, since it is larger than the sum of its proper divisors (1).

3649831 is an equidigital number, since it uses as much as digits as its factorization.

3649831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The square root of 3649831 is about 1910.4530876208. The cubic root of 3649831 is about 153.9657960806.

The spelling of 3649831 in words is "three million, six hundred forty-nine thousand, eight hundred thirty-one".