26697889 has 3 divisors (see below), whose sum is σ = 26703057. Its totient is φ = 26692722.

The previous prime is 26697877. The next prime is 26697899. The reversal of 26697889 is 98879662.

The square root of 26697889 is 5167.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 26697889 - 2⁷ = 26697761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26697829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2584 + ... + 7750.

It is an arithmetic number, because the mean of its divisors is an integer number (8901019).

Almost surely, 2^26697889 is an apocalyptic number.

26697889 is the 5167-th square number.

26697889 is the 2584-th centered octagonal number.

It is an amenable number.

26697889 is a deficient number, since it is larger than the sum of its proper divisors (5168).

26697889 is an frugal number, since it uses more digits than its factorization.

26697889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10334 (or 5167 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 55.

The cubic root of 26697889 is about 298.8768708875.

The spelling of 26697889 in words is "twenty-six million, six hundred ninety-seven thousand, eight hundred eighty-nine".