3921563 has 4 divisors (see below), whose sum is σ = 3937080. Its totient is φ = 3906048.

The previous prime is 3921559. The next prime is 3921601. The reversal of 3921563 is 3651293.

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 3921563 - 2² = 3921559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3921503) 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, 7373 + ... + 7886.

It is an arithmetic number, because the mean of its divisors is an integer number (984270).

Almost surely, 2^3921563 is an apocalyptic number.

3921563 is a deficient number, since it is larger than the sum of its proper divisors (15517).

3921563 is a wasteful number, since it uses less digits than its factorization.

3921563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15516.

The product of its digits is 4860, while the sum is 29.

The square root of 3921563 is about 1980.2936650911. The cubic root of 3921563 is about 157.6956567327.

The spelling of 3921563 in words is "three million, nine hundred twenty-one thousand, five hundred sixty-three".