989959433 has 2 divisors, whose sum is σ = 989959434. Its totient is φ = 989959432.

The previous prime is 989959403. The next prime is 989959441. The reversal of 989959433 is 334959989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 977625289 + 12334144 = 31267^2 + 3512^2 .

It is a cyclic number.

It is not a de Polignac number, because 989959433 - 2¹⁶ = 989893897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (989959403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494979716 + 494979717.

It is an arithmetic number, because the mean of its divisors is an integer number (494979717).

Almost surely, 2^989959433 is an apocalyptic number.

It is an amenable number.

989959433 is a deficient number, since it is larger than the sum of its proper divisors (1).

989959433 is an equidigital number, since it uses as much as digits as its factorization.

989959433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9447840, while the sum is 59.

The square root of 989959433 is about 31463.6207865528. The cubic root of 989959433 is about 996.6418799864.

The spelling of 989959433 in words is "nine hundred eighty-nine million, nine hundred fifty-nine thousand, four hundred thirty-three".