26260991 has 4 divisors (see below), whose sum is σ = 26294184. Its totient is φ = 26227800.

The previous prime is 26260987. The next prime is 26261041. The reversal of 26260991 is 19906262.

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 26260991 - 2² = 26260987 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 (26260901) 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, 15380 + ... + 17001.

It is an arithmetic number, because the mean of its divisors is an integer number (6573546).

Almost surely, 2^26260991 is an apocalyptic number.

26260991 is a deficient number, since it is larger than the sum of its proper divisors (33193).

26260991 is an equidigital number, since it uses as much as digits as its factorization.

26260991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33192.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 26260991 is about 5124.5478824966. The cubic root of 26260991 is about 297.2375709908.

The spelling of 26260991 in words is "twenty-six million, two hundred sixty thousand, nine hundred ninety-one".