64050809 has 2 divisors, whose sum is σ = 64050810. Its totient is φ = 64050808.

The previous prime is 64050797. The next prime is 64050827. The reversal of 64050809 is 90805046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33965584 + 30085225 = 5828^2 + 5485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64050809 is a prime.

It is a super-2 number, since 2×64050809² = 8205012267108962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64050839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32025404 + 32025405.

It is an arithmetic number, because the mean of its divisors is an integer number (32025405).

Almost surely, 2^64050809 is an apocalyptic number.

It is an amenable number.

64050809 is a deficient number, since it is larger than the sum of its proper divisors (1).

64050809 is an equidigital number, since it uses as much as digits as its factorization.

64050809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 64050809 is about 8003.1749324877. The cubic root of 64050809 is about 400.1058240840.

The spelling of 64050809 in words is "sixty-four million, fifty thousand, eight hundred nine".