64062809 has 2 divisors, whose sum is σ = 64062810. Its totient is φ = 64062808.

The previous prime is 64062781. The next prime is 64062811. The reversal of 64062809 is 90826046.

64062809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62094400 + 1968409 = 7880^2 + 1403^2 .

It is a cyclic number.

It is not a de Polignac number, because 64062809 - 2¹² = 64058713 is a prime.

Together with 64062811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64062899) 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, 32031404 + 32031405.

It is an arithmetic number, because the mean of its divisors is an integer number (32031405).

Almost surely, 2^64062809 is an apocalyptic number.

It is an amenable number.

64062809 is a deficient number, since it is larger than the sum of its proper divisors (1).

64062809 is an equidigital number, since it uses as much as digits as its factorization.

64062809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 64062809 is about 8003.9245998448. The cubic root of 64062809 is about 400.1308093010.

The spelling of 64062809 in words is "sixty-four million, sixty-two thousand, eight hundred nine".