64639214 has 4 divisors (see below), whose sum is σ = 96958824. Its totient is φ = 32319606.

The previous prime is 64639213. The next prime is 64639229. The reversal of 64639214 is 41293646.

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

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64639213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16159802 + ... + 16159805.

It is an arithmetic number, because the mean of its divisors is an integer number (24239706).

Almost surely, 2^64639214 is an apocalyptic number.

64639214 is a deficient number, since it is larger than the sum of its proper divisors (32319610).

64639214 is a wasteful number, since it uses less digits than its factorization.

64639214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32319609.

The product of its digits is 31104, while the sum is 35.

The square root of 64639214 is about 8039.8516155461. The cubic root of 64639214 is about 401.3272867367.

The spelling of 64639214 in words is "sixty-four million, six hundred thirty-nine thousand, two hundred fourteen".