65319689 has 8 divisors (see below), whose sum is σ = 67189320. Its totient is φ = 63455616.

The previous prime is 65319673. The next prime is 65319719. The reversal of 65319689 is 98691356.

65319689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 30415225 + 34904464 = 5515^2 + 5908^2 .

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 65319689 - 2⁴ = 65319673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65319619) 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, 37367 + ... + 39075.

It is an arithmetic number, because the mean of its divisors is an integer number (8398665).

Almost surely, 2^65319689 is an apocalyptic number.

It is an amenable number.

65319689 is a deficient number, since it is larger than the sum of its proper divisors (1869631).

65319689 is a wasteful number, since it uses less digits than its factorization.

65319689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2779.

The product of its digits is 349920, while the sum is 47.

The square root of 65319689 is about 8082.0597003487. The cubic root of 65319689 is about 402.7306682905.

The spelling of 65319689 in words is "sixty-five million, three hundred nineteen thousand, six hundred eighty-nine".