26987563 has 4 divisors (see below), whose sum is σ = 27007200. Its totient is φ = 26967928.

The previous prime is 26987561. The next prime is 26987567. The reversal of 26987563 is 36578962.

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 26987563 - 2¹ = 26987561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26987561) 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, 7588 + ... + 10561.

It is an arithmetic number, because the mean of its divisors is an integer number (6751800).

Almost surely, 2^26987563 is an apocalyptic number.

26987563 is a deficient number, since it is larger than the sum of its proper divisors (19637).

26987563 is a wasteful number, since it uses less digits than its factorization.

26987563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19636.

The product of its digits is 544320, while the sum is 46.

The square root of 26987563 is about 5194.9555339772. The cubic root of 26987563 is about 299.9539299626.

The spelling of 26987563 in words is "twenty-six million, nine hundred eighty-seven thousand, five hundred sixty-three".