64191873 has 16 divisors (see below), whose sum is σ = 90322560. Its totient is φ = 40470144.

The previous prime is 64191857. The next prime is 64191901. The reversal of 64191873 is 37819146.

It is not a de Polignac number, because 64191873 - 2⁴ = 64191857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64191833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 915 + ... + 11367.

It is an arithmetic number, because the mean of its divisors is an integer number (5645160).

Almost surely, 2^64191873 is an apocalyptic number.

It is an amenable number.

64191873 is a deficient number, since it is larger than the sum of its proper divisors (26130687).

64191873 is a wasteful number, since it uses less digits than its factorization.

64191873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10568.

The product of its digits is 36288, while the sum is 39.

The square root of 64191873 is about 8011.9830878503. The cubic root of 64191873 is about 400.3993366097.

The spelling of 64191873 in words is "sixty-four million, one hundred ninety-one thousand, eight hundred seventy-three".