441661823 has 2 divisors, whose sum is σ = 441661824. Its totient is φ = 441661822.

The previous prime is 441661813. The next prime is 441661849. The reversal of 441661823 is 328166144.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 441661823 - 2⁴ = 441661807 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (441661813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220830911 + 220830912.

It is an arithmetic number, because the mean of its divisors is an integer number (220830912).

Almost surely, 2^441661823 is an apocalyptic number.

441661823 is a deficient number, since it is larger than the sum of its proper divisors (1).

441661823 is an equidigital number, since it uses as much as digits as its factorization.

441661823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 35.

The square root of 441661823 is about 21015.7517828889. The cubic root of 441661823 is about 761.5468397465.

The spelling of 441661823 in words is "four hundred forty-one million, six hundred sixty-one thousand, eight hundred twenty-three".