64997073 has 20 divisors (see below), whose sum is σ = 97580208. Its totient is φ = 43114680.

The previous prime is 64997063. The next prime is 64997077. The reversal of 64997073 is 37079946.

It is not a de Polignac number, because 64997073 - 2⁵ = 64997041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64997077) 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 19 ways as a sum of consecutive naturals, for example, 15190 + ... + 18992.

Almost surely, 2^64997073 is an apocalyptic number.

It is an amenable number.

64997073 is a deficient number, since it is larger than the sum of its proper divisors (32583135).

64997073 is a wasteful number, since it uses less digits than its factorization.

64997073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4026 (or 4017 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 45.

The square root of 64997073 is about 8062.0762214209. The cubic root of 64997073 is about 402.0665405559.

The spelling of 64997073 in words is "sixty-four million, nine hundred ninety-seven thousand, seventy-three".