65304989 has 4 divisors (see below), whose sum is σ = 65915424. Its totient is φ = 64694556.

The previous prime is 65304983. The next prime is 65304991. The reversal of 65304989 is 98940356.

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 a de Polignac number, because none of the positive numbers 2^k-65304989 is a prime.

It is a super-3 number, since 3×65304989³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65304983) 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, 305057 + ... + 305270.

It is an arithmetic number, because the mean of its divisors is an integer number (16478856).

Almost surely, 2^65304989 is an apocalyptic number.

It is an amenable number.

65304989 is a deficient number, since it is larger than the sum of its proper divisors (610435).

65304989 is a wasteful number, since it uses less digits than its factorization.

65304989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610434.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 65304989 is about 8081.1502275357. The cubic root of 65304989 is about 402.7004549145.

The spelling of 65304989 in words is "sixty-five million, three hundred four thousand, nine hundred eighty-nine".