3640331 has 2 divisors, whose sum is σ = 3640332. Its totient is φ = 3640330.

The previous prime is 3640327. The next prime is 3640333. The reversal of 3640331 is 1330463.

3640331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3640331 - 2² = 3640327 is a prime.

It is a super-2 number, since 2×3640331² = 26504019579122, which contains 22 as substring.

Together with 3640333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3640333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1820165 + 1820166.

It is an arithmetic number, because the mean of its divisors is an integer number (1820166).

Almost surely, 2^3640331 is an apocalyptic number.

3640331 is a deficient number, since it is larger than the sum of its proper divisors (1).

3640331 is an equidigital number, since it uses as much as digits as its factorization.

3640331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 3640331 is about 1907.9651464322. The cubic root of 3640331 is about 153.8320961963.

Adding to 3640331 its reverse (1330463), we get a palindrome (4970794).

The spelling of 3640331 in words is "three million, six hundred forty thousand, three hundred thirty-one".