26697899 has 2 divisors, whose sum is σ = 26697900. Its totient is φ = 26697898.

The previous prime is 26697877. The next prime is 26697901. The reversal of 26697899 is 99879662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26697899 - 2²⁴ = 9920683 is a prime.

It is a super-2 number, since 2×26697899² = 1425555622028402, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 26697901, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26697829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13348949 + 13348950.

It is an arithmetic number, because the mean of its divisors is an integer number (13348950).

Almost surely, 2^26697899 is an apocalyptic number.

26697899 is a deficient number, since it is larger than the sum of its proper divisors (1).

26697899 is an equidigital number, since it uses as much as digits as its factorization.

26697899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 56.

The square root of 26697899 is about 5167.0009676794. Note that the first 3 decimals coincide. The cubic root of 26697899 is about 298.8769082034.

The spelling of 26697899 in words is "twenty-six million, six hundred ninety-seven thousand, eight hundred ninety-nine".