823857663 has 8 divisors (see below), whose sum is σ = 1098650800. Its totient is φ = 549151488.

The previous prime is 823857653. The next prime is 823857673. The reversal of 823857663 is 366758328.

It is an interprime number because it is at equal distance from previous prime (823857653) and next prime (823857673).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 823857663 - 2⁴ = 823857647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823857653) 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 7 ways as a sum of consecutive naturals, for example, 5103 + ... + 40911.

It is an arithmetic number, because the mean of its divisors is an integer number (137331350).

Almost surely, 2^823857663 is an apocalyptic number.

823857663 is a deficient number, since it is larger than the sum of its proper divisors (274793137).

823857663 is a wasteful number, since it uses less digits than its factorization.

823857663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43481.

The product of its digits is 1451520, while the sum is 48.

The square root of 823857663 is about 28702.9208095622. The cubic root of 823857663 is about 937.4556449059.

The spelling of 823857663 in words is "eight hundred twenty-three million, eight hundred fifty-seven thousand, six hundred sixty-three".