64634171 has 4 divisors (see below), whose sum is σ = 73867632. Its totient is φ = 55400712.

The previous prime is 64634161. The next prime is 64634173. The reversal of 64634171 is 17143646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64634171 - 2¹⁰ = 64633147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64634173) 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, 4616720 + ... + 4616733.

It is an arithmetic number, because the mean of its divisors is an integer number (18466908).

Almost surely, 2^64634171 is an apocalyptic number.

64634171 is a deficient number, since it is larger than the sum of its proper divisors (9233461).

64634171 is an equidigital number, since it uses as much as digits as its factorization.

64634171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9233460.

The product of its digits is 12096, while the sum is 32.

The square root of 64634171 is about 8039.5379842377. The cubic root of 64634171 is about 401.3168495938.

The spelling of 64634171 in words is "sixty-four million, six hundred thirty-four thousand, one hundred seventy-one".