823016685 has 16 divisors (see below), whose sum is σ = 1321519680. Its totient is φ = 437377920.

The previous prime is 823016681. The next prime is 823016693. The reversal of 823016685 is 586610328.

It is a happy number.

It is not a de Polignac number, because 823016685 - 2² = 823016681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823016681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93415 + ... + 101844.

It is an arithmetic number, because the mean of its divisors is an integer number (82594980).

Almost surely, 2^823016685 is an apocalyptic number.

It is an amenable number.

823016685 is a deficient number, since it is larger than the sum of its proper divisors (498502995).

823016685 is a wasteful number, since it uses less digits than its factorization.

823016685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195548.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 823016685 is about 28688.2673753575. The cubic root of 823016685 is about 937.1365574328.

The spelling of 823016685 in words is "eight hundred twenty-three million, sixteen thousand, six hundred eighty-five".