26536991 has 4 divisors (see below), whose sum is σ = 28578312. Its totient is φ = 24495672.

The previous prime is 26536957. The next prime is 26536997. The reversal of 26536991 is 19963562.

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 26536991 - 2⁶ = 26536927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26536997) 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, 1020641 + ... + 1020666.

It is an arithmetic number, because the mean of its divisors is an integer number (7144578).

Almost surely, 2^26536991 is an apocalyptic number.

26536991 is a deficient number, since it is larger than the sum of its proper divisors (2041321).

26536991 is a wasteful number, since it uses less digits than its factorization.

26536991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2041320.

The product of its digits is 87480, while the sum is 41.

The square root of 26536991 is about 5151.4067010866. The cubic root of 26536991 is about 298.2752550371.

The spelling of 26536991 in words is "twenty-six million, five hundred thirty-six thousand, nine hundred ninety-one".