26864231 has 2 divisors, whose sum is σ = 26864232. Its totient is φ = 26864230.

The previous prime is 26864209. The next prime is 26864239. The reversal of 26864231 is 13246862.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26864231 is a prime.

It is a super-2 number, since 2×26864231² = 1443373814442722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26864239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13432115 + 13432116.

It is an arithmetic number, because the mean of its divisors is an integer number (13432116).

Almost surely, 2^26864231 is an apocalyptic number.

26864231 is a deficient number, since it is larger than the sum of its proper divisors (1).

26864231 is an equidigital number, since it uses as much as digits as its factorization.

26864231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 32.

The square root of 26864231 is about 5183.0715796717. The cubic root of 26864231 is about 299.4963066351.

The spelling of 26864231 in words is "twenty-six million, eight hundred sixty-four thousand, two hundred thirty-one".