923940945 has 64 divisors (see below), whose sum is σ = 1704729600. Its totient is φ = 474439680.

The previous prime is 923940943. The next prime is 923940961. The reversal of 923940945 is 549049329.

It is a happy number.

923940945 is a `hidden beast` number, since 9 + 239 + 409 + 4 + 5 = 666.

It is not a de Polignac number, because 923940945 - 2¹ = 923940943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 923940945.

It is not an unprimeable number, because it can be changed into a prime (923940943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 436209 + ... + 438321.

It is an arithmetic number, because the mean of its divisors is an integer number (26636400).

Almost surely, 2^923940945 is an apocalyptic number.

It is an amenable number.

923940945 is a deficient number, since it is larger than the sum of its proper divisors (780788655).

923940945 is a wasteful number, since it uses less digits than its factorization.

923940945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2247 (or 2241 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 923940945 is about 30396.3969081863. The cubic root of 923940945 is about 973.9755867681.

The spelling of 923940945 in words is "nine hundred twenty-three million, nine hundred forty thousand, nine hundred forty-five".