26283781 has 2 divisors, whose sum is σ = 26283782. Its totient is φ = 26283780.

The previous prime is 26283769. The next prime is 26283791. The reversal of 26283781 is 18738262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21622500 + 4661281 = 4650^2 + 2159^2 .

It is a cyclic number.

It is not a de Polignac number, because 26283781 - 2⁹ = 26283269 is a prime.

It is a super-2 number, since 2×26283781² = 1381674287311922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26283781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26283791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13141890 + 13141891.

It is an arithmetic number, because the mean of its divisors is an integer number (13141891).

Almost surely, 2^26283781 is an apocalyptic number.

It is an amenable number.

26283781 is a deficient number, since it is larger than the sum of its proper divisors (1).

26283781 is an equidigital number, since it uses as much as digits as its factorization.

26283781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 37.

The square root of 26283781 is about 5126.7710110751. The cubic root of 26283781 is about 297.3235297375.

The spelling of 26283781 in words is "twenty-six million, two hundred eighty-three thousand, seven hundred eighty-one".