989982739 has 2 divisors, whose sum is σ = 989982740. Its totient is φ = 989982738.

The previous prime is 989982731. The next prime is 989982751. The reversal of 989982739 is 937289989.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 989982739 - 2³ = 989982731 is a prime.

It is not a weakly prime, because it can be changed into another prime (989982731) 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, 494991369 + 494991370.

It is an arithmetic number, because the mean of its divisors is an integer number (494991370).

Almost surely, 2^989982739 is an apocalyptic number.

989982739 is a deficient number, since it is larger than the sum of its proper divisors (1).

989982739 is an equidigital number, since it uses as much as digits as its factorization.

989982739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17635968, while the sum is 64.

The square root of 989982739 is about 31463.9911486130. The cubic root of 989982739 is about 996.6497010320.

The spelling of 989982739 in words is "nine hundred eighty-nine million, nine hundred eighty-two thousand, seven hundred thirty-nine".