44444891 has 2 divisors, whose sum is σ = 44444892. Its totient is φ = 44444890.

The previous prime is 44444863. The next prime is 44444893. The reversal of 44444891 is 19844444.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44444891 is a prime.

It is a Sophie Germain prime.

Together with 44444893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (44444893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22222445 + 22222446.

It is an arithmetic number, because the mean of its divisors is an integer number (22222446).

Almost surely, 2^44444891 is an apocalyptic number.

44444891 is a deficient number, since it is larger than the sum of its proper divisors (1).

44444891 is an equidigital number, since it uses as much as digits as its factorization.

44444891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73728, while the sum is 38.

The square root of 44444891 is about 6666.7001582492. The cubic root of 44444891 is about 354.2207093971.

The spelling of 44444891 in words is "forty-four million, four hundred forty-four thousand, eight hundred ninety-one".