83564647 has 2 divisors, whose sum is σ = 83564648. Its totient is φ = 83564646.

The previous prime is 83564617. The next prime is 83564659. The reversal of 83564647 is 74646538.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83564647 - 2¹⁵ = 83531879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83564617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41782323 + 41782324.

It is an arithmetic number, because the mean of its divisors is an integer number (41782324).

Almost surely, 2^83564647 is an apocalyptic number.

83564647 is a deficient number, since it is larger than the sum of its proper divisors (1).

83564647 is an equidigital number, since it uses as much as digits as its factorization.

83564647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 43.

The square root of 83564647 is about 9141.3700833081. The cubic root of 83564647 is about 437.1940012101.

The spelling of 83564647 in words is "eighty-three million, five hundred sixty-four thousand, six hundred forty-seven".