64985273 has 4 divisors (see below), whose sum is σ = 65592720. Its totient is φ = 64377828.

The previous prime is 64985251. The next prime is 64985279. The reversal of 64985273 is 37258946.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37258946 = 2 ⋅18629473.

It is a cyclic number.

It is not a de Polignac number, because 64985273 - 2⁸ = 64985017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64985279) 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, 303563 + ... + 303776.

It is an arithmetic number, because the mean of its divisors is an integer number (16398180).

Almost surely, 2^64985273 is an apocalyptic number.

It is an amenable number.

64985273 is a deficient number, since it is larger than the sum of its proper divisors (607447).

64985273 is a wasteful number, since it uses less digits than its factorization.

64985273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607446.

The product of its digits is 362880, while the sum is 44.

The square root of 64985273 is about 8061.3443667914. The cubic root of 64985273 is about 402.0422078072.

The spelling of 64985273 in words is "sixty-four million, nine hundred eighty-five thousand, two hundred seventy-three".