983981549 has 2 divisors, whose sum is σ = 983981550. Its totient is φ = 983981548.

The previous prime is 983981533. The next prime is 983981617. The reversal of 983981549 is 945189389.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 943595524 + 40386025 = 30718^2 + 6355^2 .

It is a cyclic number.

It is not a de Polignac number, because 983981549 - 2⁴ = 983981533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 983981494 and 983981503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (988981549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 491990774 + 491990775.

It is an arithmetic number, because the mean of its divisors is an integer number (491990775).

Almost surely, 2^983981549 is an apocalyptic number.

It is an amenable number.

983981549 is a deficient number, since it is larger than the sum of its proper divisors (1).

983981549 is an equidigital number, since it uses as much as digits as its factorization.

983981549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 56.

The square root of 983981549 is about 31368.4801831393. The cubic root of 983981549 is about 994.6317497906.

The spelling of 983981549 in words is "nine hundred eighty-three million, nine hundred eighty-one thousand, five hundred forty-nine".