64826973 has 10 divisors (see below), whose sum is σ = 96840414. Its totient is φ = 43217928.

The previous prime is 64826969. The next prime is 64827011. The reversal of 64826973 is 37962846.

It can be written as a sum of positive squares in only one way, i.e., 33489369 + 31337604 = 5787^2 + 5598^2 .

It is not a de Polignac number, because 64826973 - 2² = 64826969 is a prime.

It is a Curzon number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64826953) 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 9 ways as a sum of consecutive naturals, for example, 400086 + ... + 400247.

Almost surely, 2^64826973 is an apocalyptic number.

It is an amenable number.

64826973 is a deficient number, since it is larger than the sum of its proper divisors (32013441).

64826973 is an equidigital number, since it uses as much as digits as its factorization.

64826973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800345 (or 800336 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 64826973 is about 8051.5199186241. The cubic root of 64826973 is about 401.7154926116.

The spelling of 64826973 in words is "sixty-four million, eight hundred twenty-six thousand, nine hundred seventy-three".