1004445399 has 4 divisors (see below), whose sum is σ = 1339260536. Its totient is φ = 669630264.

The previous prime is 1004445389. The next prime is 1004445419. The reversal of 1004445399 is 9935444001.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1004445399 - 2¹³ = 1004437207 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 (1004445329) 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, 167407564 + ... + 167407569.

It is an arithmetic number, because the mean of its divisors is an integer number (334815134).

Almost surely, 2^1004445399 is an apocalyptic number.

1004445399 is a deficient number, since it is larger than the sum of its proper divisors (334815137).

1004445399 is an equidigital number, since it uses as much as digits as its factorization.

1004445399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334815136.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 1004445399 is about 31692.9865900959. The cubic root of 1004445399 is about 1001.4796093431.

The spelling of 1004445399 in words is "one billion, four million, four hundred forty-five thousand, three hundred ninety-nine".