65539973 has 8 divisors (see below), whose sum is σ = 66816960. Its totient is φ = 64268640.

The previous prime is 65539963. The next prime is 65539993. The reversal of 65539973 is 37993556.

65539973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 65539973 - 2¹⁴ = 65523589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65539933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27593 + ... + 29873.

It is an arithmetic number, because the mean of its divisors is an integer number (8352120).

Almost surely, 2^65539973 is an apocalyptic number.

It is an amenable number.

65539973 is a deficient number, since it is larger than the sum of its proper divisors (1276987).

65539973 is a wasteful number, since it uses less digits than its factorization.

65539973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2827.

The product of its digits is 765450, while the sum is 47.

The square root of 65539973 is about 8095.6761916470. The cubic root of 65539973 is about 403.1828830451.

The spelling of 65539973 in words is "sixty-five million, five hundred thirty-nine thousand, nine hundred seventy-three".