4891563 has 16 divisors (see below), whose sum is σ = 7673760. Its totient is φ = 3068928.

The previous prime is 4891559. The next prime is 4891567. The reversal of 4891563 is 3651984.

4891563 is a `hidden beast` number, since 4 + 8 + 91 + 563 = 666.

It is an interprime number because it is at equal distance from previous prime (4891559) and next prime (4891567).

It is not a de Polignac number, because 4891563 - 2² = 4891559 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (4891567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4870 + ... + 5787.

It is an arithmetic number, because the mean of its divisors is an integer number (479610).

Almost surely, 2^4891563 is an apocalyptic number.

4891563 is a deficient number, since it is larger than the sum of its proper divisors (2782197).

4891563 is a wasteful number, since it uses less digits than its factorization.

4891563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10683 (or 10677 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 4891563 is about 2211.6878170302. The cubic root of 4891563 is about 169.7523846062.

The spelling of 4891563 in words is "four million, eight hundred ninety-one thousand, five hundred sixty-three".