65430509 has 8 divisors (see below), whose sum is σ = 68958240. Its totient is φ = 61911216.

The previous prime is 65430493. The next prime is 65430517. The reversal of 65430509 is 90503456.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65430509 - 2⁴ = 65430493 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65430539) 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 7 ways as a sum of consecutive naturals, for example, 19682 + ... + 22764.

It is an arithmetic number, because the mean of its divisors is an integer number (8619780).

Almost surely, 2^65430509 is an apocalyptic number.

It is an amenable number.

65430509 is a deficient number, since it is larger than the sum of its proper divisors (3527731).

65430509 is a wasteful number, since it uses less digits than its factorization.

65430509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4219.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 65430509 is about 8088.9127205082. The cubic root of 65430509 is about 402.9582943827.

The spelling of 65430509 in words is "sixty-five million, four hundred thirty thousand, five hundred nine".