44199917 has 2 divisors, whose sum is σ = 44199918. Its totient is φ = 44199916.

The previous prime is 44199913. The next prime is 44199971. The reversal of 44199917 is 71999144.

It is a happy number.

Together with next prime (44199971) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43414921 + 784996 = 6589^2 + 886^2 .

It is a cyclic number.

It is not a de Polignac number, because 44199917 - 2² = 44199913 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 (44199913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22099958 + 22099959.

It is an arithmetic number, because the mean of its divisors is an integer number (22099959).

Almost surely, 2^44199917 is an apocalyptic number.

It is an amenable number.

44199917 is a deficient number, since it is larger than the sum of its proper divisors (1).

44199917 is an equidigital number, since it uses as much as digits as its factorization.

44199917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 44.

The square root of 44199917 is about 6648.3018132452. The cubic root of 44199917 is about 353.5687050655.

The spelling of 44199917 in words is "forty-four million, one hundred ninety-nine thousand, nine hundred seventeen".