26761921 has 2 divisors, whose sum is σ = 26761922. Its totient is φ = 26761920.

The previous prime is 26761919. The next prime is 26761957. The reversal of 26761921 is 12916762.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21762225 + 4999696 = 4665^2 + 2236^2 .

It is a cyclic number.

It is not a de Polignac number, because 26761921 - 2¹ = 26761919 is a prime.

It is a super-2 number, since 2×26761921² = 1432400831220482, which contains 22 as substring.

Together with 26761919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (26764921) 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, 13380960 + 13380961.

It is an arithmetic number, because the mean of its divisors is an integer number (13380961).

Almost surely, 2^26761921 is an apocalyptic number.

It is an amenable number.

26761921 is a deficient number, since it is larger than the sum of its proper divisors (1).

26761921 is an equidigital number, since it uses as much as digits as its factorization.

26761921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 34.

The square root of 26761921 is about 5173.1925345960. The cubic root of 26761921 is about 299.1156214027.

The spelling of 26761921 in words is "twenty-six million, seven hundred sixty-one thousand, nine hundred twenty-one".