26439481 has 2 divisors, whose sum is σ = 26439482. Its totient is φ = 26439480.

The previous prime is 26439467. The next prime is 26439487. The reversal of 26439481 is 18493462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26419600 + 19881 = 5140^2 + 141^2 .

It is a cyclic number.

It is not a de Polignac number, because 26439481 - 2⁵ = 26439449 is a prime.

It is a super-2 number, since 2×26439481² = 1398092311098722, 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 26439481.

It is not a weakly prime, because it can be changed into another prime (26439487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13219740 + 13219741.

It is an arithmetic number, because the mean of its divisors is an integer number (13219741).

Almost surely, 2^26439481 is an apocalyptic number.

It is an amenable number.

26439481 is a deficient number, since it is larger than the sum of its proper divisors (1).

26439481 is an equidigital number, since it uses as much as digits as its factorization.

26439481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 37.

The square root of 26439481 is about 5141.9335857243. The cubic root of 26439481 is about 297.9094698203.

The spelling of 26439481 in words is "twenty-six million, four hundred thirty-nine thousand, four hundred eighty-one".