65986489 has 4 divisors (see below), whose sum is σ = 66332160. Its totient is φ = 65640820.

The previous prime is 65986483. The next prime is 65986499. The reversal of 65986489 is 98468956.

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 65986489 - 2²¹ = 63889337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65986483) 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, 172549 + ... + 172930.

It is an arithmetic number, because the mean of its divisors is an integer number (16583040).

Almost surely, 2^65986489 is an apocalyptic number.

It is an amenable number.

65986489 is a deficient number, since it is larger than the sum of its proper divisors (345671).

65986489 is a wasteful number, since it uses less digits than its factorization.

65986489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345670.

The product of its digits is 3732480, while the sum is 55.

The square root of 65986489 is about 8123.2068175075. The cubic root of 65986489 is about 404.0964238197.

The spelling of 65986489 in words is "sixty-five million, nine hundred eighty-six thousand, four hundred eighty-nine".