65280889 has 4 divisors (see below), whose sum is σ = 65415424. Its totient is φ = 65146356.

The previous prime is 65280883. The next prime is 65280893. The reversal of 65280889 is 98808256.

It is a happy number.

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 65280889 - 2²³ = 56892281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65280883) 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, 66537 + ... + 67510.

It is an arithmetic number, because the mean of its divisors is an integer number (16353856).

Almost surely, 2^65280889 is an apocalyptic number.

It is an amenable number.

65280889 is a deficient number, since it is larger than the sum of its proper divisors (134535).

65280889 is a wasteful number, since it uses less digits than its factorization.

65280889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134534.

The product of its (nonzero) digits is 276480, while the sum is 46.

The square root of 65280889 is about 8079.6589655752. The cubic root of 65280889 is about 402.6509116090.

The spelling of 65280889 in words is "sixty-five million, two hundred eighty thousand, eight hundred eighty-nine".