65539697 has 4 divisors (see below), whose sum is σ = 67063920. Its totient is φ = 64015476.

The previous prime is 65539657. The next prime is 65539703. The reversal of 65539697 is 79693556.

65539697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 65539697 - 2⁶ = 65539633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65539637) 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 3 ways as a sum of consecutive naturals, for example, 762047 + ... + 762132.

It is an arithmetic number, because the mean of its divisors is an integer number (16765980).

Almost surely, 2^65539697 is an apocalyptic number.

It is an amenable number.

65539697 is a deficient number, since it is larger than the sum of its proper divisors (1524223).

65539697 is a wasteful number, since it uses less digits than its factorization.

65539697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1524222.

The product of its digits is 1530900, while the sum is 50.

The square root of 65539697 is about 8095.6591454927. The cubic root of 65539697 is about 403.1823170870.

The spelling of 65539697 in words is "sixty-five million, five hundred thirty-nine thousand, six hundred ninety-seven".