445505923 has 4 divisors (see below), whose sum is σ = 445680328. Its totient is φ = 445331520.

The previous prime is 445505911. The next prime is 445505941. The reversal of 445505923 is 329505544.

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 445505923 - 2⁵ = 445505891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445505023) 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, 83313 + ... + 88498.

It is an arithmetic number, because the mean of its divisors is an integer number (111420082).

Almost surely, 2^445505923 is an apocalyptic number.

445505923 is a deficient number, since it is larger than the sum of its proper divisors (174405).

445505923 is a wasteful number, since it uses less digits than its factorization.

445505923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174404.

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 445505923 is about 21107.0112284994. The cubic root of 445505923 is about 763.7498901481.

The spelling of 445505923 in words is "four hundred forty-five million, five hundred five thousand, nine hundred twenty-three".