64288409 has 2 divisors, whose sum is σ = 64288410. Its totient is φ = 64288408.

The previous prime is 64288403. The next prime is 64288421. The reversal of 64288409 is 90488246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63952009 + 336400 = 7997^2 + 580^2 .

It is a cyclic number.

It is not a de Polignac number, because 64288409 - 2¹² = 64284313 is a prime.

It is not a weakly prime, because it can be changed into another prime (64288403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32144204 + 32144205.

It is an arithmetic number, because the mean of its divisors is an integer number (32144205).

Almost surely, 2^64288409 is an apocalyptic number.

It is an amenable number.

64288409 is a deficient number, since it is larger than the sum of its proper divisors (1).

64288409 is an equidigital number, since it uses as much as digits as its factorization.

64288409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 64288409 is about 8018.0053005720. The cubic root of 64288409 is about 400.5999517781.

The spelling of 64288409 in words is "sixty-four million, two hundred eighty-eight thousand, four hundred nine".