65316409 has 4 divisors (see below), whose sum is σ = 65749120. Its totient is φ = 64883700.

The previous prime is 65316371. The next prime is 65316413. The reversal of 65316409 is 90461356.

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 65316409 - 2⁹ = 65315897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65316109) 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, 216129 + ... + 216430.

It is an arithmetic number, because the mean of its divisors is an integer number (16437280).

Almost surely, 2^65316409 is an apocalyptic number.

It is an amenable number.

65316409 is a deficient number, since it is larger than the sum of its proper divisors (432711).

65316409 is a wasteful number, since it uses less digits than its factorization.

65316409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432710.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 65316409 is about 8081.8567792309. The cubic root of 65316409 is about 402.7239271955.

The spelling of 65316409 in words is "sixty-five million, three hundred sixteen thousand, four hundred nine".