26997569 has 2 divisors, whose sum is σ = 26997570. Its totient is φ = 26997568.

The previous prime is 26997473. The next prime is 26997571. The reversal of 26997569 is 96579962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20133169 + 6864400 = 4487^2 + 2620^2 .

It is a cyclic number.

It is not a de Polignac number, because 26997569 - 2¹⁶ = 26932033 is a prime.

It is a super-2 number, since 2×26997569² = 1457737463819522, which contains 22 as substring.

Together with 26997571, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26997569.

It is not a weakly prime, because it can be changed into another prime (26997589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13498784 + 13498785.

It is an arithmetic number, because the mean of its divisors is an integer number (13498785).

Almost surely, 2^26997569 is an apocalyptic number.

It is an amenable number.

26997569 is a deficient number, since it is larger than the sum of its proper divisors (1).

26997569 is an equidigital number, since it uses as much as digits as its factorization.

26997569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1837080, while the sum is 53.

The square root of 26997569 is about 5195.9184943569. The cubic root of 26997569 is about 299.9909960261.

The spelling of 26997569 in words is "twenty-six million, nine hundred ninety-seven thousand, five hundred sixty-nine".