3643291 has 2 divisors, whose sum is σ = 3643292. Its totient is φ = 3643290.

The previous prime is 3643271. The next prime is 3643303. The reversal of 3643291 is 1923463.

It is a strong prime.

It is an emirp because it is prime and its reverse (1923463) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3643291 - 2¹¹ = 3641243 is a prime.

It is a Chen prime.

3643291 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (3643201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1821645 + 1821646.

It is an arithmetic number, because the mean of its divisors is an integer number (1821646).

Almost surely, 2^3643291 is an apocalyptic number.

3643291 is a deficient number, since it is larger than the sum of its proper divisors (1).

3643291 is an equidigital number, since it uses as much as digits as its factorization.

3643291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 28.

The square root of 3643291 is about 1908.7406843257. The cubic root of 3643291 is about 153.8737791866.

It can be divided in two parts, 364 and 3291, that added together give a triangular number (3655 = T₈₅).

The spelling of 3643291 in words is "three million, six hundred forty-three thousand, two hundred ninety-one".