26347891 has 2 divisors, whose sum is σ = 26347892. Its totient is φ = 26347890.

The previous prime is 26347883. The next prime is 26347907. The reversal of 26347891 is 19874362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26347891 - 2³ = 26347883 is a prime.

It is a super-2 number, since 2×26347891² = 1388422720295762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26347291) 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 as a sum of consecutive naturals, namely, 13173945 + 13173946.

It is an arithmetic number, because the mean of its divisors is an integer number (13173946).

Almost surely, 2^26347891 is an apocalyptic number.

26347891 is a deficient number, since it is larger than the sum of its proper divisors (1).

26347891 is an equidigital number, since it uses as much as digits as its factorization.

26347891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 26347891 is about 5133.0196765647. The cubic root of 26347891 is about 297.5650720356.

The spelling of 26347891 in words is "twenty-six million, three hundred forty-seven thousand, eight hundred ninety-one".