64634471 has 4 divisors (see below), whose sum is σ = 70510344. Its totient is φ = 58758600.

The previous prime is 64634429. The next prime is 64634497. The reversal of 64634471 is 17443646.

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 64634471 - 2⁶ = 64634407 is a prime.

It is a super-3 number, since 3×64634471³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64631471) 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, 2937920 + ... + 2937941.

It is an arithmetic number, because the mean of its divisors is an integer number (17627586).

Almost surely, 2^64634471 is an apocalyptic number.

64634471 is a deficient number, since it is larger than the sum of its proper divisors (5875873).

64634471 is a wasteful number, since it uses less digits than its factorization.

64634471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5875872.

The product of its digits is 48384, while the sum is 35.

The square root of 64634471 is about 8039.5566420046. The cubic root of 64634471 is about 401.3174704979.

The spelling of 64634471 in words is "sixty-four million, six hundred thirty-four thousand, four hundred seventy-one".