44449891 has 2 divisors, whose sum is σ = 44449892. Its totient is φ = 44449890.

The previous prime is 44449871. The next prime is 44449897. The reversal of 44449891 is 19894444.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 44449891 - 2²³ = 36061283 is a prime.

It is not a weakly prime, because it can be changed into another prime (44449897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22224945 + 22224946.

It is an arithmetic number, because the mean of its divisors is an integer number (22224946).

Almost surely, 2^44449891 is an apocalyptic number.

44449891 is a deficient number, since it is larger than the sum of its proper divisors (1).

44449891 is an equidigital number, since it uses as much as digits as its factorization.

44449891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 43.

The square root of 44449891 is about 6667.0751458192. The cubic root of 44449891 is about 354.2339920422.

The spelling of 44449891 in words is "forty-four million, four hundred forty-nine thousand, eight hundred ninety-one".