65352409 has 4 divisors (see below), whose sum is σ = 65451940. Its totient is φ = 65252880.

The previous prime is 65352383. The next prime is 65352431. The reversal of 65352409 is 90425356.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58446025 + 6906384 = 7645^2 + 2628^2 .

It is a cyclic number.

It is not a de Polignac number, because 65352409 - 2⁷ = 65352281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65352449) 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, 48774 + ... + 50095.

It is an arithmetic number, because the mean of its divisors is an integer number (16362985).

Almost surely, 2^65352409 is an apocalyptic number.

It is an amenable number.

65352409 is a deficient number, since it is larger than the sum of its proper divisors (99531).

65352409 is an equidigital number, since it uses as much as digits as its factorization.

65352409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99530.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 65352409 is about 8084.0836833868. The cubic root of 65352409 is about 402.7979024737.

The spelling of 65352409 in words is "sixty-five million, three hundred fifty-two thousand, four hundred nine".