26722491 has 4 divisors (see below), whose sum is σ = 35629992. Its totient is φ = 17814992.

The previous prime is 26722477. The next prime is 26722511. The reversal of 26722491 is 19422762.

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 26722491 - 2⁹ = 26721979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26722411) 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, 4453746 + ... + 4453751.

It is an arithmetic number, because the mean of its divisors is an integer number (8907498).

Almost surely, 2^26722491 is an apocalyptic number.

26722491 is a deficient number, since it is larger than the sum of its proper divisors (8907501).

26722491 is an equidigital number, since it uses as much as digits as its factorization.

26722491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8907500.

The product of its digits is 12096, while the sum is 33.

The square root of 26722491 is about 5169.3801369216. The cubic root of 26722491 is about 298.9686473242.

The spelling of 26722491 in words is "twenty-six million, seven hundred twenty-two thousand, four hundred ninety-one".