993944449 has 2 divisors, whose sum is σ = 993944450. Its totient is φ = 993944448.

The previous prime is 993944437. The next prime is 993944459. The reversal of 993944449 is 944449399.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 726033025 + 267911424 = 26945^2 + 16368^2 .

It is a cyclic number.

It is not a de Polignac number, because 993944449 - 2¹⁹ = 993420161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 993944449.

It is not a weakly prime, because it can be changed into another prime (993944459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496972224 + 496972225.

It is an arithmetic number, because the mean of its divisors is an integer number (496972225).

Almost surely, 2^993944449 is an apocalyptic number.

It is an amenable number.

993944449 is a deficient number, since it is larger than the sum of its proper divisors (1).

993944449 is an equidigital number, since it uses as much as digits as its factorization.

993944449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5038848, while the sum is 55.

The square root of 993944449 is about 31526.8845431958. The cubic root of 993944449 is about 997.9773948264.

The spelling of 993944449 in words is "nine hundred ninety-three million, nine hundred forty-four thousand, four hundred forty-nine".