65824013 has 4 divisors (see below), whose sum is σ = 67354848. Its totient is φ = 64293180.

The previous prime is 65824009. The next prime is 65824021. The reversal of 65824013 is 31042856.

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 65824013 - 2² = 65824009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65824043) 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, 765353 + ... + 765438.

It is an arithmetic number, because the mean of its divisors is an integer number (16838712).

Almost surely, 2^65824013 is an apocalyptic number.

It is an amenable number.

65824013 is a deficient number, since it is larger than the sum of its proper divisors (1530835).

65824013 is a wasteful number, since it uses less digits than its factorization.

65824013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530834.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 65824013 is about 8113.1999235813. The cubic root of 65824013 is about 403.7644875260.

Adding to 65824013 its reverse (31042856), we get a palindrome (96866869).

The spelling of 65824013 in words is "sixty-five million, eight hundred twenty-four thousand, thirteen".