444816091 has 2 divisors, whose sum is σ = 444816092. Its totient is φ = 444816090.

The previous prime is 444816077. The next prime is 444816157. The reversal of 444816091 is 190618444.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 444816091 - 2⁷ = 444815963 is a prime.

It is a super-2 number, since 2×444816091² = 395722709625040562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 444816091.

It is not a weakly prime, because it can be changed into another prime (444816041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222408045 + 222408046.

It is an arithmetic number, because the mean of its divisors is an integer number (222408046).

Almost surely, 2^444816091 is an apocalyptic number.

444816091 is a deficient number, since it is larger than the sum of its proper divisors (1).

444816091 is an equidigital number, since it uses as much as digits as its factorization.

444816091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 444816091 is about 21090.6635979051. The cubic root of 444816091 is about 763.3554836581.

The spelling of 444816091 in words is "four hundred forty-four million, eight hundred sixteen thousand, ninety-one".