864951613 has 4 divisors (see below), whose sum is σ = 868074460. Its totient is φ = 861828768.

The previous prime is 864951599. The next prime is 864951629. The reversal of 864951613 is 316159468.

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 557054404 + 307897209 = 23602^2 + 17547^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-864951613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 864951613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864951673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1561008 + ... + 1561561.

It is an arithmetic number, because the mean of its divisors is an integer number (217018615).

Almost surely, 2^864951613 is an apocalyptic number.

It is an amenable number.

864951613 is a deficient number, since it is larger than the sum of its proper divisors (3122847).

864951613 is a wasteful number, since it uses less digits than its factorization.

864951613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3122846.

The product of its digits is 155520, while the sum is 43.

The square root of 864951613 is about 29410.0597245228. The cubic root of 864951613 is about 952.7901768351.

The spelling of 864951613 in words is "eight hundred sixty-four million, nine hundred fifty-one thousand, six hundred thirteen".