26919197 has 2 divisors, whose sum is σ = 26919198. Its totient is φ = 26919196.

The previous prime is 26919133. The next prime is 26919209. The reversal of 26919197 is 79191962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25512601 + 1406596 = 5051^2 + 1186^2 .

It is a cyclic number.

It is not a de Polignac number, because 26919197 - 2⁶ = 26919133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26919107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13459598 + 13459599.

It is an arithmetic number, because the mean of its divisors is an integer number (13459599).

Almost surely, 2^26919197 is an apocalyptic number.

It is an amenable number.

26919197 is a deficient number, since it is larger than the sum of its proper divisors (1).

26919197 is an equidigital number, since it uses as much as digits as its factorization.

26919197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61236, while the sum is 44.

The square root of 26919197 is about 5188.3713244139. The cubic root of 26919197 is about 299.7004305898.

The spelling of 26919197 in words is "twenty-six million, nine hundred nineteen thousand, one hundred ninety-seven".