441855613 has 2 divisors, whose sum is σ = 441855614. Its totient is φ = 441855612.

The previous prime is 441855581. The next prime is 441855677. The reversal of 441855613 is 316558144.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 437520889 + 4334724 = 20917^2 + 2082^2 .

It is a cyclic number.

It is not a de Polignac number, because 441855613 - 2⁵ = 441855581 is a prime.

It is a super-3 number, since 3×441855613³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (441855913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220927806 + 220927807.

It is an arithmetic number, because the mean of its divisors is an integer number (220927807).

Almost surely, 2^441855613 is an apocalyptic number.

It is an amenable number.

441855613 is a deficient number, since it is larger than the sum of its proper divisors (1).

441855613 is an equidigital number, since it uses as much as digits as its factorization.

441855613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 37.

The square root of 441855613 is about 21020.3618665331. The cubic root of 441855613 is about 761.6582059358.

It can be divided in two parts, 4418 and 55613, that added together give a triangular number (60031 = T₃₄₆).

The spelling of 441855613 in words is "four hundred forty-one million, eight hundred fifty-five thousand, six hundred thirteen".