445047839 has 4 divisors (see below), whose sum is σ = 445495224. Its totient is φ = 444600456.

The previous prime is 445047787. The next prime is 445047847. The reversal of 445047839 is 938740544.

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 445047839 - 2¹² = 445043743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 445047839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445047139) 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, 222197 + ... + 224190.

It is an arithmetic number, because the mean of its divisors is an integer number (111373806).

Almost surely, 2^445047839 is an apocalyptic number.

445047839 is a deficient number, since it is larger than the sum of its proper divisors (447385).

445047839 is an equidigital number, since it uses as much as digits as its factorization.

445047839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447384.

The product of its (nonzero) digits is 483840, while the sum is 44.

The square root of 445047839 is about 21096.1569723019. The cubic root of 445047839 is about 763.4880293675.

The spelling of 445047839 in words is "four hundred forty-five million, forty-seven thousand, eight hundred thirty-nine".