26564947 has 2 divisors, whose sum is σ = 26564948. Its totient is φ = 26564946.

The previous prime is 26564933. The next prime is 26564969. The reversal of 26564947 is 74946562.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26564947 - 2²³ = 18176339 is a prime.

It is a super-2 number, since 2×26564947² = 1411392818225618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26564347) 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, 13282473 + 13282474.

It is an arithmetic number, because the mean of its divisors is an integer number (13282474).

Almost surely, 2^26564947 is an apocalyptic number.

26564947 is a deficient number, since it is larger than the sum of its proper divisors (1).

26564947 is an equidigital number, since it uses as much as digits as its factorization.

26564947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 43.

The square root of 26564947 is about 5154.1194204248. The cubic root of 26564947 is about 298.3799599072.

The spelling of 26564947 in words is "twenty-six million, five hundred sixty-four thousand, nine hundred forty-seven".