26938981 has 2 divisors, whose sum is σ = 26938982. Its totient is φ = 26938980.

The previous prime is 26938973. The next prime is 26938991. The reversal of 26938981 is 18983962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26884225 + 54756 = 5185^2 + 234^2 .

It is a cyclic number.

It is not a de Polignac number, because 26938981 - 2³ = 26938973 is a prime.

It is a super-2 number, since 2×26938981² = 1451417394636722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26938991) 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, 13469490 + 13469491.

It is an arithmetic number, because the mean of its divisors is an integer number (13469491).

Almost surely, 2^26938981 is an apocalyptic number.

It is an amenable number.

26938981 is a deficient number, since it is larger than the sum of its proper divisors (1).

26938981 is an equidigital number, since it uses as much as digits as its factorization.

26938981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 46.

The square root of 26938981 is about 5190.2775455654. The cubic root of 26938981 is about 299.7738332419.

The spelling of 26938981 in words is "twenty-six million, nine hundred thirty-eight thousand, nine hundred eighty-one".