3647641 has 2 divisors, whose sum is σ = 3647642. Its totient is φ = 3647640.

The previous prime is 3647629. The next prime is 3647671. The reversal of 3647641 is 1467463.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3312400 + 335241 = 1820^2 + 579^2 .

It is a cyclic number.

It is not a de Polignac number, because 3647641 - 2¹⁵ = 3614873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3647671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1823820 + 1823821.

It is an arithmetic number, because the mean of its divisors is an integer number (1823821).

Almost surely, 2^3647641 is an apocalyptic number.

It is an amenable number.

3647641 is a deficient number, since it is larger than the sum of its proper divisors (1).

3647641 is an equidigital number, since it uses as much as digits as its factorization.

3647641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 31.

The square root of 3647641 is about 1909.8798391522. The cubic root of 3647641 is about 153.9349953343.

The spelling of 3647641 in words is "three million, six hundred forty-seven thousand, six hundred forty-one".