64327909 has 2 divisors, whose sum is σ = 64327910. Its totient is φ = 64327908.

The previous prime is 64327903. The next prime is 64327927. The reversal of 64327909 is 90972346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62062884 + 2265025 = 7878^2 + 1505^2 .

It is a cyclic number.

It is not a de Polignac number, because 64327909 - 2¹⁵ = 64295141 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64327903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32163954 + 32163955.

It is an arithmetic number, because the mean of its divisors is an integer number (32163955).

Almost surely, 2^64327909 is an apocalyptic number.

It is an amenable number.

64327909 is a deficient number, since it is larger than the sum of its proper divisors (1).

64327909 is an equidigital number, since it uses as much as digits as its factorization.

64327909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 64327909 is about 8020.4681284823. The cubic root of 64327909 is about 400.6819803462.

It can be divided in two parts, 6432 and 7909, that added together give a palindrome (14341).

The spelling of 64327909 in words is "sixty-four million, three hundred twenty-seven thousand, nine hundred nine".