26197019 has 4 divisors (see below), whose sum is σ = 26806296. Its totient is φ = 25587744.

The previous prime is 26197009. The next prime is 26197021. The reversal of 26197019 is 91079162.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91079162 = 2 ⋅45539581.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26197019 is a prime.

It is a super-2 number, since 2×26197019² = 1372567608972722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26197019.

It is not an unprimeable number, because it can be changed into a prime (26197009) 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, 304574 + ... + 304659.

It is an arithmetic number, because the mean of its divisors is an integer number (6701574).

Almost surely, 2^26197019 is an apocalyptic number.

26197019 is a deficient number, since it is larger than the sum of its proper divisors (609277).

26197019 is an equidigital number, since it uses as much as digits as its factorization.

26197019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609276.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 26197019 is about 5118.3023552737. The cubic root of 26197019 is about 296.9960169819.

The spelling of 26197019 in words is "twenty-six million, one hundred ninety-seven thousand, nineteen".