26990563 has 4 divisors (see below), whose sum is σ = 27002800. Its totient is φ = 26978328.

The previous prime is 26990531. The next prime is 26990567. The reversal of 26990563 is 36509962.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 26990563 - 2⁵ = 26990531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26990567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1788 + ... + 7561.

It is an arithmetic number, because the mean of its divisors is an integer number (6750700).

Almost surely, 2^26990563 is an apocalyptic number.

26990563 is a deficient number, since it is larger than the sum of its proper divisors (12237).

26990563 is an equidigital number, since it uses as much as digits as its factorization.

26990563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12236.

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 26990563 is about 5195.2442675970. The cubic root of 26990563 is about 299.9650440753.

The spelling of 26990563 in words is "twenty-six million, nine hundred ninety thousand, five hundred sixty-three".