816441313 has 4 divisors (see below), whose sum is σ = 816639408. Its totient is φ = 816243220.

The previous prime is 816441299. The next prime is 816441317. The reversal of 816441313 is 313144618.

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 a de Polignac number, because none of the positive numbers 2^k-816441313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816441317) 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, 92731 + ... + 101152.

It is an arithmetic number, because the mean of its divisors is an integer number (204159852).

Almost surely, 2^816441313 is an apocalyptic number.

It is an amenable number.

816441313 is a deficient number, since it is larger than the sum of its proper divisors (198095).

816441313 is a wasteful number, since it uses less digits than its factorization.

816441313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198094.

The product of its digits is 6912, while the sum is 31.

The square root of 816441313 is about 28573.4371926095. The cubic root of 816441313 is about 934.6341760469.

The spelling of 816441313 in words is "eight hundred sixteen million, four hundred forty-one thousand, three hundred thirteen".