64694217 has 8 divisors (see below), whose sum is σ = 98581696. Its totient is φ = 36968112.

The previous prime is 64694213. The next prime is 64694243. The reversal of 64694217 is 71249646.

It is a happy number.

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

It is not a de Polignac number, because 64694217 - 2² = 64694213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64694213) 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, 1540318 + ... + 1540359.

It is an arithmetic number, because the mean of its divisors is an integer number (12322712).

Almost surely, 2^64694217 is an apocalyptic number.

It is an amenable number.

64694217 is a deficient number, since it is larger than the sum of its proper divisors (33887479).

64694217 is a wasteful number, since it uses less digits than its factorization.

64694217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3080687.

The product of its digits is 72576, while the sum is 39.

The square root of 64694217 is about 8043.2715358864. The cubic root of 64694217 is about 401.4410873499.

The spelling of 64694217 in words is "sixty-four million, six hundred ninety-four thousand, two hundred seventeen".