64473273 has 16 divisors (see below), whose sum is σ = 98598400. Its totient is φ = 41595120.

The previous prime is 64473271. The next prime is 64473317. The reversal of 64473273 is 37237446.

It is a happy number.

64473273 is a `hidden beast` number, since 644 + 7 + 3 + 2 + 7 + 3 = 666.

It is not a de Polignac number, because 64473273 - 2¹ = 64473271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64473271) 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, 37678 + ... + 39351.

It is an arithmetic number, because the mean of its divisors is an integer number (6162400).

Almost surely, 2^64473273 is an apocalyptic number.

It is an amenable number.

64473273 is a deficient number, since it is larger than the sum of its proper divisors (34125127).

64473273 is a wasteful number, since it uses less digits than its factorization.

64473273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77069 (or 77063 counting only the distinct ones).

The product of its digits is 84672, while the sum is 36.

The square root of 64473273 is about 8029.5250793556. The cubic root of 64473273 is about 400.9835649344.

It can be divided in two parts, 64473 and 273, that added together give a palindrome (64746).

The spelling of 64473273 in words is "sixty-four million, four hundred seventy-three thousand, two hundred seventy-three".