988961549 has 2 divisors, whose sum is σ = 988961550. Its totient is φ = 988961548.

The previous prime is 988961543. The next prime is 988961557. The reversal of 988961549 is 945169889.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 921426025 + 67535524 = 30355^2 + 8218^2 .

It is a cyclic number.

It is not a de Polignac number, because 988961549 - 2²⁰ = 987912973 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (988961543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494480774 + 494480775.

It is an arithmetic number, because the mean of its divisors is an integer number (494480775).

Almost surely, 2^988961549 is an apocalyptic number.

It is an amenable number.

988961549 is a deficient number, since it is larger than the sum of its proper divisors (1).

988961549 is an equidigital number, since it uses as much as digits as its factorization.

988961549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5598720, while the sum is 59.

The square root of 988961549 is about 31447.7590457571. The cubic root of 988961549 is about 996.3068940922.

The spelling of 988961549 in words is "nine hundred eighty-eight million, nine hundred sixty-one thousand, five hundred forty-nine".