65217939 has 8 divisors (see below), whose sum is σ = 89307600. Its totient is φ = 42303456.

The previous prime is 65217883. The next prime is 65217959. The reversal of 65217939 is 93971256.

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

It is not a de Polignac number, because 65217939 - 2¹³ = 65209747 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65217939.

It is not an unprimeable number, because it can be changed into a prime (65217959) 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, 293664 + ... + 293885.

It is an arithmetic number, because the mean of its divisors is an integer number (11163450).

Almost surely, 2^65217939 is an apocalyptic number.

65217939 is a deficient number, since it is larger than the sum of its proper divisors (24089661).

65217939 is a wasteful number, since it uses less digits than its factorization.

65217939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587589.

The product of its digits is 102060, while the sum is 42.

The square root of 65217939 is about 8075.7624407854. The cubic root of 65217939 is about 402.5214453036.

The spelling of 65217939 in words is "sixty-five million, two hundred seventeen thousand, nine hundred thirty-nine".