919044449 has 2 divisors, whose sum is σ = 919044450. Its totient is φ = 919044448.

The previous prime is 919044431. The next prime is 919044473. The reversal of 919044449 is 944440919.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 648211600 + 270832849 = 25460^2 + 16457^2 .

It is an emirp because it is prime and its reverse (944440919) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 919044449 - 2¹⁶ = 918978913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (919044409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459522224 + 459522225.

It is an arithmetic number, because the mean of its divisors is an integer number (459522225).

Almost surely, 2^919044449 is an apocalyptic number.

It is an amenable number.

919044449 is a deficient number, since it is larger than the sum of its proper divisors (1).

919044449 is an equidigital number, since it uses as much as digits as its factorization.

919044449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 919044449 is about 30315.7458921927. The cubic root of 919044449 is about 972.2519855782.

The spelling of 919044449 in words is "nine hundred nineteen million, forty-four thousand, four hundred forty-nine".