26931143 has 2 divisors, whose sum is σ = 26931144. Its totient is φ = 26931142.

The previous prime is 26931139. The next prime is 26931187. The reversal of 26931143 is 34113962.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26931143 - 2² = 26931139 is a prime.

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 (26931193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13465571 + 13465572.

It is an arithmetic number, because the mean of its divisors is an integer number (13465572).

Almost surely, 2^26931143 is an apocalyptic number.

26931143 is a deficient number, since it is larger than the sum of its proper divisors (1).

26931143 is an equidigital number, since it uses as much as digits as its factorization.

26931143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 29.

The square root of 26931143 is about 5189.5224250407. The cubic root of 26931143 is about 299.7447569723.

The spelling of 26931143 in words is "twenty-six million, nine hundred thirty-one thousand, one hundred forty-three".