65522389 has 4 divisors (see below), whose sum is σ = 65636524. Its totient is φ = 65408256.

The previous prime is 65522381. The next prime is 65522399. The reversal of 65522389 is 98322556.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43007364 + 22515025 = 6558^2 + 4745^2 .

It is a cyclic number.

It is not a de Polignac number, because 65522389 - 2³ = 65522381 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 (65522381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56202 + ... + 57355.

It is an arithmetic number, because the mean of its divisors is an integer number (16409131).

Almost surely, 2^65522389 is an apocalyptic number.

It is an amenable number.

65522389 is a deficient number, since it is larger than the sum of its proper divisors (114135).

65522389 is a wasteful number, since it uses less digits than its factorization.

65522389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114134.

The product of its digits is 129600, while the sum is 40.

The square root of 65522389 is about 8094.5901069789. The cubic root of 65522389 is about 403.1468225993.

The spelling of 65522389 in words is "sixty-five million, five hundred twenty-two thousand, three hundred eighty-nine".