64671273 has 12 divisors (see below), whose sum is σ = 94730688. Its totient is φ = 42506520.

The previous prime is 64671259. The next prime is 64671287. The reversal of 64671273 is 37217646.

64671273 is a `hidden beast` number, since 646 + 7 + 1 + 2 + 7 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (64671259) and next prime (64671287).

It is not a de Polignac number, because 64671273 - 2⁵ = 64671241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64671973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49965 + ... + 51242.

It is an arithmetic number, because the mean of its divisors is an integer number (7894224).

Almost surely, 2^64671273 is an apocalyptic number.

It is an amenable number.

64671273 is a deficient number, since it is larger than the sum of its proper divisors (30059415).

64671273 is a wasteful number, since it uses less digits than its factorization.

64671273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101284 (or 101281 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The square root of 64671273 is about 8041.8451240993. The cubic root of 64671273 is about 401.3936243060.

The spelling of 64671273 in words is "sixty-four million, six hundred seventy-one thousand, two hundred seventy-three".