64473289 has 4 divisors (see below), whose sum is σ = 67866640. Its totient is φ = 61079940.

The previous prime is 64473271. The next prime is 64473317. The reversal of 64473289 is 98237446.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64473289 - 2⁷ = 64473161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64473239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1696647 + ... + 1696684.

It is an arithmetic number, because the mean of its divisors is an integer number (16966660).

Almost surely, 2^64473289 is an apocalyptic number.

It is an amenable number.

64473289 is a deficient number, since it is larger than the sum of its proper divisors (3393351).

64473289 is a wasteful number, since it uses less digits than its factorization.

64473289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3393350.

The product of its digits is 290304, while the sum is 43.

The square root of 64473289 is about 8029.5260756784. The cubic root of 64473289 is about 400.9835981044.

The spelling of 64473289 in words is "sixty-four million, four hundred seventy-three thousand, two hundred eighty-nine".