441505993 has 4 divisors (see below), whose sum is σ = 441774100. Its totient is φ = 441237888.

The previous prime is 441505991. The next prime is 441506011. The reversal of 441505993 is 399505144.

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

It can be written as a sum of positive squares in 2 ways, for example, as 141419664 + 300086329 = 11892^2 + 17323^2 .

It is a cyclic number.

It is not a de Polignac number, because 441505993 - 2¹ = 441505991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (441505991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131568 + ... + 134881.

It is an arithmetic number, because the mean of its divisors is an integer number (110443525).

Almost surely, 2^441505993 is an apocalyptic number.

It is an amenable number.

441505993 is a deficient number, since it is larger than the sum of its proper divisors (268107).

441505993 is a wasteful number, since it uses less digits than its factorization.

441505993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268106.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 441505993 is about 21012.0439986214. The cubic root of 441505993 is about 761.4572645727.

The spelling of 441505993 in words is "four hundred forty-one million, five hundred five thousand, nine hundred ninety-three".