445713809 has 4 divisors (see below), whose sum is σ = 446317680. Its totient is φ = 445109940.

The previous prime is 445713781. The next prime is 445713817. The reversal of 445713809 is 908317544.

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 445713809 - 2¹² = 445709713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445713839) 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, 300827 + ... + 302304.

It is an arithmetic number, because the mean of its divisors is an integer number (111579420).

Almost surely, 2^445713809 is an apocalyptic number.

It is an amenable number.

445713809 is a deficient number, since it is larger than the sum of its proper divisors (603871).

445713809 is an equidigital number, since it uses as much as digits as its factorization.

445713809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603870.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 445713809 is about 21111.9352263122. The cubic root of 445713809 is about 763.8686676337.

The spelling of 445713809 in words is "four hundred forty-five million, seven hundred thirteen thousand, eight hundred nine".