26730191 has 4 divisors (see below), whose sum is σ = 27096432. Its totient is φ = 26363952.

The previous prime is 26730181. The next prime is 26730211. The reversal of 26730191 is 19103762.

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 26730191 - 2¹⁰ = 26729167 is a prime.

It is a super-2 number, since 2×26730191² = 1429006221792962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26730101) 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, 183011 + ... + 183156.

It is an arithmetic number, because the mean of its divisors is an integer number (6774108).

Almost surely, 2^26730191 is an apocalyptic number.

26730191 is a deficient number, since it is larger than the sum of its proper divisors (366241).

26730191 is an equidigital number, since it uses as much as digits as its factorization.

26730191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366240.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 26730191 is about 5170.1248534247. The cubic root of 26730191 is about 298.9973601852.

The spelling of 26730191 in words is "twenty-six million, seven hundred thirty thousand, one hundred ninety-one".