3605891 has 2 divisors, whose sum is σ = 3605892. Its totient is φ = 3605890.

The previous prime is 3605881. The next prime is 3605897. The reversal of 3605891 is 1985063.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3605891 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3605897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1802945 + 1802946.

It is an arithmetic number, because the mean of its divisors is an integer number (1802946).

Almost surely, 2^3605891 is an apocalyptic number.

3605891 is a deficient number, since it is larger than the sum of its proper divisors (1).

3605891 is an equidigital number, since it uses as much as digits as its factorization.

3605891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 3605891 is about 1898.9183763395. The cubic root of 3605891 is about 153.3454396028.

The spelling of 3605891 in words is "three million, six hundred five thousand, eight hundred ninety-one".