823782313 has 4 divisors (see below), whose sum is σ = 850355968. Its totient is φ = 797208660.

The previous prime is 823782307. The next prime is 823782331. The reversal of 823782313 is 313287328.

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-823782313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (823782343) 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, 13286781 + ... + 13286842.

It is an arithmetic number, because the mean of its divisors is an integer number (212588992).

Almost surely, 2^823782313 is an apocalyptic number.

It is an amenable number.

823782313 is a deficient number, since it is larger than the sum of its proper divisors (26573655).

823782313 is a wasteful number, since it uses less digits than its factorization.

823782313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26573654.

The product of its digits is 48384, while the sum is 37.

The square root of 823782313 is about 28701.6081953608. The cubic root of 823782313 is about 937.4270641451.

The spelling of 823782313 in words is "eight hundred twenty-three million, seven hundred eighty-two thousand, three hundred thirteen".