981479549 has 2 divisors, whose sum is σ = 981479550. Its totient is φ = 981479548.

The previous prime is 981479537. The next prime is 981479579. The reversal of 981479549 is 945974189.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 943595524 + 37884025 = 30718^2 + 6155^2 .

It is a cyclic number.

It is not a de Polignac number, because 981479549 - 2⁴ = 981479533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 981479494 and 981479503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981479579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490739774 + 490739775.

It is an arithmetic number, because the mean of its divisors is an integer number (490739775).

Almost surely, 2^981479549 is an apocalyptic number.

It is an amenable number.

981479549 is a deficient number, since it is larger than the sum of its proper divisors (1).

981479549 is an equidigital number, since it uses as much as digits as its factorization.

981479549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 56.

The square root of 981479549 is about 31328.5740020193. The cubic root of 981479549 is about 993.7880073856.

The spelling of 981479549 in words is "nine hundred eighty-one million, four hundred seventy-nine thousand, five hundred forty-nine".