864214915 has 4 divisors (see below), whose sum is σ = 1037057904. Its totient is φ = 691371928.

The previous prime is 864214913. The next prime is 864214963. The reversal of 864214915 is 519412468.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 864214915 - 2¹ = 864214913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (864214913) 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, 86421487 + ... + 86421496.

It is an arithmetic number, because the mean of its divisors is an integer number (259264476).

Almost surely, 2^864214915 is an apocalyptic number.

864214915 is a deficient number, since it is larger than the sum of its proper divisors (172842989).

864214915 is a wasteful number, since it uses less digits than its factorization.

864214915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172842988.

The product of its digits is 69120, while the sum is 40.

The square root of 864214915 is about 29397.5324644774. The cubic root of 864214915 is about 952.5195959990.

The spelling of 864214915 in words is "eight hundred sixty-four million, two hundred fourteen thousand, nine hundred fifteen".