26375981 has 2 divisors, whose sum is σ = 26375982. Its totient is φ = 26375980.

The previous prime is 26375969. The next prime is 26375983. The reversal of 26375981 is 18957362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18139081 + 8236900 = 4259^2 + 2870^2 .

It is a cyclic number.

It is not a de Polignac number, because 26375981 - 2¹⁸ = 26113837 is a prime.

It is a super-2 number, since 2×26375981² = 1391384747424722, which contains 22 as substring.

Together with 26375983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26375983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13187990 + 13187991.

It is an arithmetic number, because the mean of its divisors is an integer number (13187991).

Almost surely, 2^26375981 is an apocalyptic number.

It is an amenable number.

26375981 is a deficient number, since it is larger than the sum of its proper divisors (1).

26375981 is an equidigital number, since it uses as much as digits as its factorization.

26375981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 26375981 is about 5135.7551538211. The cubic root of 26375981 is about 297.6707811188.

The spelling of 26375981 in words is "twenty-six million, three hundred seventy-five thousand, nine hundred eighty-one".