65784973 has 8 divisors (see below), whose sum is σ = 70027200. Its totient is φ = 61620768.

The previous prime is 65784949. The next prime is 65784977. The reversal of 65784973 is 37948756.

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 a de Polignac number, because none of the positive numbers 2^k-65784973 is a prime.

It is a super-2 number, since 2×65784973² = 8655325345221458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65784977) 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, 17761 + ... + 21142.

It is an arithmetic number, because the mean of its divisors is an integer number (8753400).

Almost surely, 2^65784973 is an apocalyptic number.

It is an amenable number.

65784973 is a deficient number, since it is larger than the sum of its proper divisors (4242227).

65784973 is a wasteful number, since it uses less digits than its factorization.

65784973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39011.

The product of its digits is 1270080, while the sum is 49.

The square root of 65784973 is about 8110.7936109853. The cubic root of 65784973 is about 403.6846479547.

The spelling of 65784973 in words is "sixty-five million, seven hundred eighty-four thousand, nine hundred seventy-three".