445475389 has 4 divisors (see below), whose sum is σ = 445581856. Its totient is φ = 445368924.

The previous prime is 445475383. The next prime is 445475413. The reversal of 445475389 is 983574544.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 445475389 - 2⁹ = 445474877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445475383) 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, 46689 + ... + 55414.

It is an arithmetic number, because the mean of its divisors is an integer number (111395464).

Almost surely, 2^445475389 is an apocalyptic number.

It is an amenable number.

445475389 is a deficient number, since it is larger than the sum of its proper divisors (106467).

445475389 is a wasteful number, since it uses less digits than its factorization.

445475389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106466.

The product of its digits is 2419200, while the sum is 49.

The square root of 445475389 is about 21106.2879019500. The cubic root of 445475389 is about 763.7324411681.

The spelling of 445475389 in words is "four hundred forty-five million, four hundred seventy-five thousand, three hundred eighty-nine".