3563891 has 4 divisors (see below), whose sum is σ = 3582000. Its totient is φ = 3545784.

The previous prime is 3563881. The next prime is 3563893. The reversal of 3563891 is 1983653.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3563891 - 2¹⁴ = 3547507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3563893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8756 + ... + 9153.

It is an arithmetic number, because the mean of its divisors is an integer number (895500).

Almost surely, 2^3563891 is an apocalyptic number.

3563891 is a deficient number, since it is larger than the sum of its proper divisors (18109).

3563891 is a wasteful number, since it uses less digits than its factorization.

3563891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18108.

The product of its digits is 19440, while the sum is 35.

The square root of 3563891 is about 1887.8270577571. The cubic root of 3563891 is about 152.7477438654.

The spelling of 3563891 in words is "three million, five hundred sixty-three thousand, eight hundred ninety-one".