64409289 has 16 divisors (see below), whose sum is σ = 101314560. Its totient is φ = 35617680.

The previous prime is 64409263. The next prime is 64409309. The reversal of 64409289 is 98290446.

It is not a de Polignac number, because 64409289 - 2⁹ = 64408777 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64409289.

It is not an unprimeable number, because it can be changed into a prime (64409089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48819 + ... + 50120.

It is an arithmetic number, because the mean of its divisors is an integer number (6332160).

Almost surely, 2^64409289 is an apocalyptic number.

It is an amenable number.

64409289 is a deficient number, since it is larger than the sum of its proper divisors (36905271).

64409289 is a wasteful number, since it uses less digits than its factorization.

64409289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98980.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 64409289 is about 8025.5397949297. The cubic root of 64409289 is about 400.8508741662.

The spelling of 64409289 in words is "sixty-four million, four hundred nine thousand, two hundred eighty-nine".