978044549 has 2 divisors, whose sum is σ = 978044550. Its totient is φ = 978044548.

The previous prime is 978044539. The next prime is 978044579. The reversal of 978044549 is 945440879.

978044549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 904204900 + 73839649 = 30070^2 + 8593^2 .

It is a cyclic number.

It is not a de Polignac number, because 978044549 - 2⁴ = 978044533 is a prime.

It is a super-2 number, since 2×978044549² = 1913142279657226802, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 978044497 and 978044506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978044539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489022274 + 489022275.

It is an arithmetic number, because the mean of its divisors is an integer number (489022275).

Almost surely, 2^978044549 is an apocalyptic number.

It is an amenable number.

978044549 is a deficient number, since it is larger than the sum of its proper divisors (1).

978044549 is an equidigital number, since it uses as much as digits as its factorization.

978044549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 978044549 is about 31273.7037940823. The cubic root of 978044549 is about 992.6272931121.

The spelling of 978044549 in words is "nine hundred seventy-eight million, forty-four thousand, five hundred forty-nine".