445393923 has 12 divisors (see below), whose sum is σ = 643054680. Its totient is φ = 274088256.

The previous prime is 445393913. The next prime is 445393933. The reversal of 445393923 is 329393544.

It is an interprime number because it is at equal distance from previous prime (445393913) and next prime (445393933).

It is not a de Polignac number, because 445393923 - 2⁶ = 445393859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (445393913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 438738 + ... + 439751.

It is an arithmetic number, because the mean of its divisors is an integer number (53587890).

Almost surely, 2^445393923 is an apocalyptic number.

445393923 is a deficient number, since it is larger than the sum of its proper divisors (197660757).

445393923 is a wasteful number, since it uses less digits than its factorization.

445393923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878518 (or 878505 counting only the distinct ones).

The product of its digits is 349920, while the sum is 42.

The square root of 445393923 is about 21104.3579148952. The cubic root of 445393923 is about 763.6858826513.

The spelling of 445393923 in words is "four hundred forty-five million, three hundred ninety-three thousand, nine hundred twenty-three".