26356381 has 2 divisors, whose sum is σ = 26356382. Its totient is φ = 26356380.

The previous prime is 26356339. The next prime is 26356387. The reversal of 26356381 is 18365362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18705625 + 7650756 = 4325^2 + 2766^2 .

It is a cyclic number.

It is not a de Polignac number, because 26356381 - 2¹¹ = 26354333 is a prime.

It is a super-2 number, since 2×26356381² = 1389317638834322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26356387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13178190 + 13178191.

It is an arithmetic number, because the mean of its divisors is an integer number (13178191).

Almost surely, 2^26356381 is an apocalyptic number.

It is an amenable number.

26356381 is a deficient number, since it is larger than the sum of its proper divisors (1).

26356381 is an equidigital number, since it uses as much as digits as its factorization.

26356381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The square root of 26356381 is about 5133.8466085383. The cubic root of 26356381 is about 297.5970297631.

It can be divided in two parts, 263 and 56381, that added together give a square (56644 = 238²).

The spelling of 26356381 in words is "twenty-six million, three hundred fifty-six thousand, three hundred eighty-one".