26864399 has 2 divisors, whose sum is σ = 26864400. Its totient is φ = 26864398.

The previous prime is 26864377. The next prime is 26864413. The reversal of 26864399 is 99346862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26864399 - 2¹² = 26860303 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 (26864599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13432199 + 13432200.

It is an arithmetic number, because the mean of its divisors is an integer number (13432200).

Almost surely, 2^26864399 is an apocalyptic number.

26864399 is a deficient number, since it is larger than the sum of its proper divisors (1).

26864399 is an equidigital number, since it uses as much as digits as its factorization.

26864399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 47.

The square root of 26864399 is about 5183.0877862525. The cubic root of 26864399 is about 299.4969309507.

The spelling of 26864399 in words is "twenty-six million, eight hundred sixty-four thousand, three hundred ninety-nine".