64985973 has 8 divisors (see below), whose sum is σ = 93313248. Its totient is φ = 39991344.

The previous prime is 64985957. The next prime is 64985983. The reversal of 64985973 is 37958946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64985973 - 2⁴ = 64985957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64985983) 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 7 ways as a sum of consecutive naturals, for example, 833115 + ... + 833192.

It is an arithmetic number, because the mean of its divisors is an integer number (11664156).

Almost surely, 2^64985973 is an apocalyptic number.

It is an amenable number.

64985973 is a deficient number, since it is larger than the sum of its proper divisors (28327275).

64985973 is a wasteful number, since it uses less digits than its factorization.

64985973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666323.

The product of its digits is 1632960, while the sum is 51.

The square root of 64985973 is about 8061.3877837504. The cubic root of 64985973 is about 402.0436513575.

The spelling of 64985973 in words is "sixty-four million, nine hundred eighty-five thousand, nine hundred seventy-three".