814302721 has 4 divisors (see below), whose sum is σ = 814503600. Its totient is φ = 814101844.

The previous prime is 814302689. The next prime is 814302757. The reversal of 814302721 is 127203418.

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 814302721 - 2⁵ = 814302689 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 814302721.

It is not an unprimeable number, because it can be changed into a prime (814302821) 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, 94231 + ... + 102508.

It is an arithmetic number, because the mean of its divisors is an integer number (203625900).

Almost surely, 2^814302721 is an apocalyptic number.

It is an amenable number.

814302721 is a deficient number, since it is larger than the sum of its proper divisors (200879).

814302721 is a wasteful number, since it uses less digits than its factorization.

814302721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200878.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 814302721 is about 28535.9899250052. The cubic root of 814302721 is about 933.8174000751.

The spelling of 814302721 in words is "eight hundred fourteen million, three hundred two thousand, seven hundred twenty-one".