64724473 has 6 divisors (see below), whose sum is σ = 71143562. Its totient is φ = 58840320.

The previous prime is 64724447. The next prime is 64724509. The reversal of 64724473 is 37442746.

It can be written as a sum of positive squares in only one way, i.e., 44582329 + 20142144 = 6677^2 + 4488^2 .

It is not a de Polignac number, because 64724473 - 2¹⁷ = 64593401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64724173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 267336 + ... + 267577.

Almost surely, 2^64724473 is an apocalyptic number.

It is an amenable number.

64724473 is a deficient number, since it is larger than the sum of its proper divisors (6419089).

64724473 is a wasteful number, since it uses less digits than its factorization.

64724473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534935 (or 534924 counting only the distinct ones).

The product of its digits is 112896, while the sum is 37.

The square root of 64724473 is about 8045.1521427503. The cubic root of 64724473 is about 401.5036591898.

The spelling of 64724473 in words is "sixty-four million, seven hundred twenty-four thousand, four hundred seventy-three".