26913881 has 2 divisors, whose sum is σ = 26913882. Its totient is φ = 26913880.

The previous prime is 26913863. The next prime is 26913889. The reversal of 26913881 is 18831962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25200400 + 1713481 = 5020^2 + 1309^2 .

It is a cyclic number.

It is not a de Polignac number, because 26913881 - 2¹⁰ = 26912857 is a prime.

It is a super-2 number, since 2×26913881² = 1448713980964322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26913889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13456940 + 13456941.

It is an arithmetic number, because the mean of its divisors is an integer number (13456941).

Almost surely, 2^26913881 is an apocalyptic number.

It is an amenable number.

26913881 is a deficient number, since it is larger than the sum of its proper divisors (1).

26913881 is an equidigital number, since it uses as much as digits as its factorization.

26913881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 38.

The square root of 26913881 is about 5187.8589996260. The cubic root of 26913881 is about 299.6807010218.

The spelling of 26913881 in words is "twenty-six million, nine hundred thirteen thousand, eight hundred eighty-one".