920784823 has 6 divisors (see below), whose sum is σ = 1071117096. Its totient is φ = 789244092.

The previous prime is 920784817. The next prime is 920784883. The reversal of 920784823 is 328487029.

It is a happy number.

It is not a de Polignac number, because 920784823 - 2¹³ = 920776631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 920784823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920784883) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9395715 + ... + 9395812.

It is an arithmetic number, because the mean of its divisors is an integer number (178519516).

Almost surely, 2^920784823 is an apocalyptic number.

920784823 is a deficient number, since it is larger than the sum of its proper divisors (150332273).

920784823 is a wasteful number, since it uses less digits than its factorization.

920784823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18791541 (or 18791534 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 920784823 is about 30344.4364422871. The cubic root of 920784823 is about 972.8653092374.

The spelling of 920784823 in words is "nine hundred twenty million, seven hundred eighty-four thousand, eight hundred twenty-three".