65871013 has 6 divisors (see below), whose sum is σ = 70969542. Its totient is φ = 60777000.

The previous prime is 65871007. The next prime is 65871049. The reversal of 65871013 is 31017856.

It can be written as a sum of positive squares in only one way, i.e., 45603009 + 20268004 = 6753^2 + 4502^2 .

It is not a de Polignac number, because 65871013 - 2¹⁷ = 65739941 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 (65871053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28138 + ... + 30388.

It is an arithmetic number, because the mean of its divisors is an integer number (11828257).

Almost surely, 2^65871013 is an apocalyptic number.

It is an amenable number.

65871013 is a deficient number, since it is larger than the sum of its proper divisors (5098529).

65871013 is an frugal number, since it uses more digits than its factorization.

65871013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4515 (or 2264 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 65871013 is about 8116.0959210694. The cubic root of 65871013 is about 403.8605639940.

Adding to 65871013 its reverse (31017856), we get a palindrome (96888869).

The spelling of 65871013 in words is "sixty-five million, eight hundred seventy-one thousand, thirteen".