65909013 has 4 divisors (see below), whose sum is σ = 87878688. Its totient is φ = 43939340.

The previous prime is 65909009. The next prime is 65909027. The reversal of 65909013 is 31090956.

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 65909013 - 2² = 65909009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65909413) 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, 10984833 + ... + 10984838.

It is an arithmetic number, because the mean of its divisors is an integer number (21969672).

Almost surely, 2^65909013 is an apocalyptic number.

It is an amenable number.

65909013 is a deficient number, since it is larger than the sum of its proper divisors (21969675).

65909013 is a wasteful number, since it uses less digits than its factorization.

65909013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21969674.

The product of its (nonzero) digits is 7290, while the sum is 33.

The square root of 65909013 is about 8118.4366105797. The cubic root of 65909013 is about 403.9382094336.

Adding to 65909013 its reverse (31090956), we get a palindrome (96999969).

The spelling of 65909013 in words is "sixty-five million, nine hundred nine thousand, thirteen".