989959511 has 2 divisors, whose sum is σ = 989959512. Its totient is φ = 989959510.

The previous prime is 989959499. The next prime is 989959561. The reversal of 989959511 is 115959989.

It is a happy number.

989959511 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 is a cyclic number.

It is not a de Polignac number, because 989959511 - 2⁶ = 989959447 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989959561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494979755 + 494979756.

It is an arithmetic number, because the mean of its divisors is an integer number (494979756).

Almost surely, 2^989959511 is an apocalyptic number.

989959511 is a deficient number, since it is larger than the sum of its proper divisors (1).

989959511 is an equidigital number, since it uses as much as digits as its factorization.

989959511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1312200, while the sum is 56.

The square root of 989959511 is about 31463.6220260796. The cubic root of 989959511 is about 996.6419061620.

The spelling of 989959511 in words is "nine hundred eighty-nine million, nine hundred fifty-nine thousand, five hundred eleven".