444013991 has 2 divisors, whose sum is σ = 444013992. Its totient is φ = 444013990.

The previous prime is 444013981. The next prime is 444014003. The reversal of 444013991 is 199310444.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 444013991 - 2¹⁰ = 444012967 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444013981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222006995 + 222006996.

It is an arithmetic number, because the mean of its divisors is an integer number (222006996).

Almost surely, 2^444013991 is an apocalyptic number.

444013991 is a deficient number, since it is larger than the sum of its proper divisors (1).

444013991 is an equidigital number, since it uses as much as digits as its factorization.

444013991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 444013991 is about 21071.6394948281. The cubic root of 444013991 is about 762.8963756926.

The spelling of 444013991 in words is "four hundred forty-four million, thirteen thousand, nine hundred ninety-one".