905449 has 2 divisors, whose sum is σ = 905450. Its totient is φ = 905448.

The previous prime is 905413. The next prime is 905453. The reversal of 905449 is 944509.

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., 846400 + 59049 = 920^2 + 243^2 .

It is a cyclic number.

It is not a de Polignac number, because 905449 - 2¹⁷ = 774377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 905449.

It is not a weakly prime, because it can be changed into another prime (905249) 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, 452724 + 452725.

It is an arithmetic number, because the mean of its divisors is an integer number (452725).

2⁹⁰⁵⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

905449 is a deficient number, since it is larger than the sum of its proper divisors (1).

905449 is an equidigital number, since it uses as much as digits as its factorization.

905449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 905449 is about 951.5508394195. The cubic root of 905449 is about 96.7433966030.

Subtracting 905449 from its reverse (944509), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 905449 in words is "nine hundred five thousand, four hundred forty-nine".