444163861 has 2 divisors, whose sum is σ = 444163862. Its totient is φ = 444163860.

The previous prime is 444163849. The next prime is 444163897. The reversal of 444163861 is 168361444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 414122500 + 30041361 = 20350^2 + 5481^2 .

It is a cyclic number.

It is not a de Polignac number, because 444163861 - 2¹¹ = 444161813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 444163861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444163801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222081930 + 222081931.

It is an arithmetic number, because the mean of its divisors is an integer number (222081931).

Almost surely, 2^444163861 is an apocalyptic number.

It is an amenable number.

444163861 is a deficient number, since it is larger than the sum of its proper divisors (1).

444163861 is an equidigital number, since it uses as much as digits as its factorization.

444163861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 37.

The square root of 444163861 is about 21075.1953964845. The cubic root of 444163861 is about 762.9822006295.

The spelling of 444163861 in words is "four hundred forty-four million, one hundred sixty-three thousand, eight hundred sixty-one".