441561091 has 2 divisors, whose sum is σ = 441561092. Its totient is φ = 441561090.

The previous prime is 441561089. The next prime is 441561101. The reversal of 441561091 is 190165144.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 441561091 - 2¹ = 441561089 is a prime.

It is a super-2 number, since 2×441561091² = 389952394170220562, which contains 22 as substring.

Together with 441561089, it forms a pair of twin primes.

It is equal to p_23429146 and since 441561091 and 23429146 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (441561011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220780545 + 220780546.

It is an arithmetic number, because the mean of its divisors is an integer number (220780546).

Almost surely, 2^441561091 is an apocalyptic number.

441561091 is a deficient number, since it is larger than the sum of its proper divisors (1).

441561091 is an equidigital number, since it uses as much as digits as its factorization.

441561091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 441561091 is about 21013.3550629118. The cubic root of 441561091 is about 761.4889387575.

The spelling of 441561091 in words is "four hundred forty-one million, five hundred sixty-one thousand, ninety-one".