65117447 has 8 divisors (see below), whose sum is σ = 67180656. Its totient is φ = 63070272.

The previous prime is 65117417. The next prime is 65117449. The reversal of 65117447 is 74471156.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 65117447 - 2¹⁰ = 65116423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65117449) 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, 4523 + ... + 12275.

It is an arithmetic number, because the mean of its divisors is an integer number (8397582).

Almost surely, 2^65117447 is an apocalyptic number.

65117447 is a deficient number, since it is larger than the sum of its proper divisors (2063209).

65117447 is a wasteful number, since it uses less digits than its factorization.

65117447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8017.

The product of its digits is 23520, while the sum is 35.

The square root of 65117447 is about 8069.5382147927. The cubic root of 65117447 is about 402.3145953705.

The spelling of 65117447 in words is "sixty-five million, one hundred seventeen thousand, four hundred forty-seven".