921368823 has 4 divisors (see below), whose sum is σ = 1228491768. Its totient is φ = 614245880.

The previous prime is 921368821. The next prime is 921368837. The reversal of 921368823 is 328863129.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 921368823 - 2¹ = 921368821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921368821) 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, 153561468 + ... + 153561473.

It is an arithmetic number, because the mean of its divisors is an integer number (307122942).

Almost surely, 2^921368823 is an apocalyptic number.

921368823 is a deficient number, since it is larger than the sum of its proper divisors (307122945).

921368823 is a wasteful number, since it uses less digits than its factorization.

921368823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307122944.

The product of its digits is 124416, while the sum is 42.

The square root of 921368823 is about 30354.0577682787. The cubic root of 921368823 is about 973.0709429726.

The spelling of 921368823 in words is "nine hundred twenty-one million, three hundred sixty-eight thousand, eight hundred twenty-three".