26397219 has 4 divisors (see below), whose sum is σ = 35196296. Its totient is φ = 17598144.

The previous prime is 26397199. The next prime is 26397223. The reversal of 26397219 is 91279362.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 26397219 - 2⁵ = 26397187 is a prime.

It is a super-2 number, since 2×26397219² = 1393626341867922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26397229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4399534 + ... + 4399539.

It is an arithmetic number, because the mean of its divisors is an integer number (8799074).

Almost surely, 2^26397219 is an apocalyptic number.

26397219 is a deficient number, since it is larger than the sum of its proper divisors (8799077).

26397219 is an equidigital number, since it uses as much as digits as its factorization.

26397219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8799076.

The product of its digits is 40824, while the sum is 39.

The square root of 26397219 is about 5137.8223986432. The cubic root of 26397219 is about 297.7506547483.

The spelling of 26397219 in words is "twenty-six million, three hundred ninety-seven thousand, two hundred nineteen".