654444449 has 2 divisors, whose sum is σ = 654444450. Its totient is φ = 654444448.

The previous prime is 654444407. The next prime is 654444467. The reversal of 654444449 is 944444456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 333318049 + 321126400 = 18257^2 + 17920^2 .

It is a cyclic number.

It is not a de Polignac number, because 654444449 - 2¹⁶ = 654378913 is a prime.

It is not a weakly prime, because it can be changed into another prime (654444499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327222224 + 327222225.

It is an arithmetic number, because the mean of its divisors is an integer number (327222225).

Almost surely, 2^654444449 is an apocalyptic number.

It is an amenable number.

654444449 is a deficient number, since it is larger than the sum of its proper divisors (1).

654444449 is an equidigital number, since it uses as much as digits as its factorization.

654444449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1105920, while the sum is 44.

The square root of 654444449 is about 25582.1118948378. Note that the first 3 decimals coincide. The cubic root of 654444449 is about 868.2089586079.

The spelling of 654444449 in words is "six hundred fifty-four million, four hundred forty-four thousand, four hundred forty-nine".