64634273 has 8 divisors (see below), whose sum is σ = 71476896. Its totient is φ = 57952800.

The previous prime is 64634249. The next prime is 64634291. The reversal of 64634273 is 37243646.

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

It is a cyclic number.

It is not a de Polignac number, because 64634273 - 2¹² = 64630177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64634233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39443 + ... + 41048.

It is an arithmetic number, because the mean of its divisors is an integer number (8934612).

Almost surely, 2^64634273 is an apocalyptic number.

It is an amenable number.

64634273 is a deficient number, since it is larger than the sum of its proper divisors (6842623).

64634273 is a wasteful number, since it uses less digits than its factorization.

64634273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80575.

The product of its digits is 72576, while the sum is 35.

The square root of 64634273 is about 8039.5443278833. The cubic root of 64634273 is about 401.3170607014.

The spelling of 64634273 in words is "sixty-four million, six hundred thirty-four thousand, two hundred seventy-three".