64312573 has 4 divisors (see below), whose sum is σ = 69259708. Its totient is φ = 59365440.

The previous prime is 64312571. The next prime is 64312579. The reversal of 64312573 is 37521346.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13089924 + 51222649 = 3618^2 + 7157^2 .

It is a cyclic number.

It is not a de Polignac number, because 64312573 - 2¹ = 64312571 is a prime.

It is a super-2 number, since 2×64312573² = 8272214091760658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64312571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2473548 + ... + 2473573.

It is an arithmetic number, because the mean of its divisors is an integer number (17314927).

Almost surely, 2^64312573 is an apocalyptic number.

It is an amenable number.

64312573 is a deficient number, since it is larger than the sum of its proper divisors (4947135).

64312573 is a wasteful number, since it uses less digits than its factorization.

64312573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4947134.

The product of its digits is 15120, while the sum is 31.

The square root of 64312573 is about 8019.5120175731. The cubic root of 64312573 is about 400.6501364839.

The spelling of 64312573 in words is "sixty-four million, three hundred twelve thousand, five hundred seventy-three".