26887969 has 4 divisors (see below), whose sum is σ = 26900500. Its totient is φ = 26875440.

The previous prime is 26887963. The next prime is 26887979. The reversal of 26887969 is 96978862.

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 can be written as a sum of positive squares in 2 ways, for example, as 6969600 + 19918369 = 2640^2 + 4463^2 .

It is a cyclic number.

It is not a de Polignac number, because 26887969 - 2⁹ = 26887457 is a prime.

It is a super-2 number, since 2×26887969² = 1445925753889922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26887963) 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 3 ways as a sum of consecutive naturals, for example, 2142 + ... + 7639.

It is an arithmetic number, because the mean of its divisors is an integer number (6725125).

Almost surely, 2^26887969 is an apocalyptic number.

It is an amenable number.

26887969 is a deficient number, since it is larger than the sum of its proper divisors (12531).

26887969 is an equidigital number, since it uses as much as digits as its factorization.

26887969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12530.

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

The square root of 26887969 is about 5185.3610288966. The cubic root of 26887969 is about 299.5844951551.

The spelling of 26887969 in words is "twenty-six million, eight hundred eighty-seven thousand, nine hundred sixty-nine".