26289947 has 2 divisors, whose sum is σ = 26289948. Its totient is φ = 26289946.

The previous prime is 26289931. The next prime is 26289971. The reversal of 26289947 is 74998262.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26289947 - 2⁴ = 26289931 is a prime.

It is a super-2 number, since 2×26289947² = 1382322626525618, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26229947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13144973 + 13144974.

It is an arithmetic number, because the mean of its divisors is an integer number (13144974).

Almost surely, 2^26289947 is an apocalyptic number.

26289947 is a deficient number, since it is larger than the sum of its proper divisors (1).

26289947 is an equidigital number, since it uses as much as digits as its factorization.

26289947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The square root of 26289947 is about 5127.3723289810. The cubic root of 26289947 is about 297.3467779597.

It can be divided in two parts, 262 and 89947, that added together give a palindrome (90209).

The spelling of 26289947 in words is "twenty-six million, two hundred eighty-nine thousand, nine hundred forty-seven".