3642643 has 2 divisors, whose sum is σ = 3642644. Its totient is φ = 3642642.

The previous prime is 3642631. The next prime is 3642649. The reversal of 3642643 is 3462463.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3642643 is a prime.

It is not a weakly prime, because it can be changed into another prime (3642649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1821321 + 1821322.

It is an arithmetic number, because the mean of its divisors is an integer number (1821322).

Almost surely, 2^3642643 is an apocalyptic number.

3642643 is a deficient number, since it is larger than the sum of its proper divisors (1).

3642643 is an equidigital number, since it uses as much as digits as its factorization.

3642643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 28.

The square root of 3642643 is about 1908.5709313515. The cubic root of 3642643 is about 153.8646559222.

The spelling of 3642643 in words is "three million, six hundred forty-two thousand, six hundred forty-three".