65528889 has 4 divisors (see below), whose sum is σ = 87371856. Its totient is φ = 43685924.

The previous prime is 65528867. The next prime is 65528917. The reversal of 65528889 is 98882556.

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 a cyclic number.

It is not a de Polignac number, because 65528889 - 2¹¹ = 65526841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65528819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10921479 + ... + 10921484.

It is an arithmetic number, because the mean of its divisors is an integer number (21842964).

Almost surely, 2^65528889 is an apocalyptic number.

It is an amenable number.

65528889 is a deficient number, since it is larger than the sum of its proper divisors (21842967).

65528889 is a wasteful number, since it uses less digits than its factorization.

65528889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21842966.

The product of its digits is 1382400, while the sum is 51.

The square root of 65528889 is about 8094.9915997486. The cubic root of 65528889 is about 403.1601532472.

The spelling of 65528889 in words is "sixty-five million, five hundred twenty-eight thousand, eight hundred eighty-nine".