26387897 has 2 divisors, whose sum is σ = 26387898. Its totient is φ = 26387896.

The previous prime is 26387891. The next prime is 26387947. The reversal of 26387897 is 79878362.

It is a happy number.

It is an a-pointer prime, because the next prime (26387947) can be obtained adding 26387897 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24810361 + 1577536 = 4981^2 + 1256^2 .

It is a cyclic number.

It is not a de Polignac number, because 26387897 - 2²² = 22193593 is a prime.

It is a super-2 number, since 2×26387897² = 1392642216165218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26387891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13193948 + 13193949.

It is an arithmetic number, because the mean of its divisors is an integer number (13193949).

Almost surely, 2^26387897 is an apocalyptic number.

It is an amenable number.

26387897 is a deficient number, since it is larger than the sum of its proper divisors (1).

26387897 is an equidigital number, since it uses as much as digits as its factorization.

26387897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 50.

The square root of 26387897 is about 5136.9151248585. The cubic root of 26387897 is about 297.7156010759.

The spelling of 26387897 in words is "twenty-six million, three hundred eighty-seven thousand, eight hundred ninety-seven".