26881919 has 2 divisors, whose sum is σ = 26881920. Its totient is φ = 26881918.

The previous prime is 26881891. The next prime is 26881969. The reversal of 26881919 is 91918862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26881919 - 2²⁰ = 25833343 is a prime.

It is a super-2 number, since 2×26881919² = 1445275138245122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26881919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26881969) 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, 13440959 + 13440960.

It is an arithmetic number, because the mean of its divisors is an integer number (13440960).

Almost surely, 2^26881919 is an apocalyptic number.

26881919 is a deficient number, since it is larger than the sum of its proper divisors (1).

26881919 is an equidigital number, since it uses as much as digits as its factorization.

26881919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 44.

The square root of 26881919 is about 5184.7776230037. Note that the first 3 decimals coincide. The cubic root of 26881919 is about 299.5620238638.

The spelling of 26881919 in words is "twenty-six million, eight hundred eighty-one thousand, nine hundred nineteen".