978449 has 2 divisors, whose sum is σ = 978450. Its totient is φ = 978448.

The previous prime is 978427. The next prime is 978457. The reversal of 978449 is 944879.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 692224 + 286225 = 832^2 + 535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-978449 is a prime.

It is a Chen prime.

It is a nialpdrome in base 16.

It is a zygodrome in base 16.

It is not a weakly prime, because it can be changed into another prime (978479) 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, 489224 + 489225.

It is an arithmetic number, because the mean of its divisors is an integer number (489225).

2⁹⁷⁸⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

978449 is a deficient number, since it is larger than the sum of its proper divisors (1).

978449 is an equidigital number, since it uses as much as digits as its factorization.

978449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 41.

The square root of 978449 is about 989.1658101653. The cubic root of 978449 is about 99.2764101391.

The spelling of 978449 in words is "nine hundred seventy-eight thousand, four hundred forty-nine".