444813493 has 4 divisors (see below), whose sum is σ = 446756140. Its totient is φ = 442870848.

The previous prime is 444813487. The next prime is 444813497. The reversal of 444813493 is 394318444.

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 284866884 + 159946609 = 16878^2 + 12647^2 .

It is a cyclic number.

It is not a de Polignac number, because 444813493 - 2⁹ = 444812981 is a prime.

It is a super-2 number, since 2×444813493² = 395718087109722098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444813497) 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, 970980 + ... + 971437.

It is an arithmetic number, because the mean of its divisors is an integer number (111689035).

Almost surely, 2^444813493 is an apocalyptic number.

It is an amenable number.

444813493 is a deficient number, since it is larger than the sum of its proper divisors (1942647).

444813493 is a wasteful number, since it uses less digits than its factorization.

444813493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1942646.

The product of its digits is 165888, while the sum is 40.

The square root of 444813493 is about 21090.6020065810. The cubic root of 444813493 is about 763.3539974998.

It can be divided in two parts, 44481 and 3493, that added together give a palindrome (47974).

The spelling of 444813493 in words is "four hundred forty-four million, eight hundred thirteen thousand, four hundred ninety-three".