823994765 has 16 divisors (see below), whose sum is σ = 1088588160. Its totient is φ = 593766720.

The previous prime is 823994749. The next prime is 823994797. The reversal of 823994765 is 567499328.

It is a happy number.

It is not a de Polignac number, because 823994765 - 2⁴ = 823994749 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62729 + ... + 74718.

It is an arithmetic number, because the mean of its divisors is an integer number (68036760).

Almost surely, 2^823994765 is an apocalyptic number.

It is an amenable number.

823994765 is a deficient number, since it is larger than the sum of its proper divisors (264593395).

823994765 is a wasteful number, since it uses less digits than its factorization.

823994765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137572.

The product of its digits is 3265920, while the sum is 53.

The square root of 823994765 is about 28705.3090037366. The cubic root of 823994765 is about 937.5076441451.

The spelling of 823994765 in words is "eight hundred twenty-three million, nine hundred ninety-four thousand, seven hundred sixty-five".