989833393 has 2 divisors, whose sum is σ = 989833394. Its totient is φ = 989833392.

The previous prime is 989833337. The next prime is 989833417. The reversal of 989833393 is 393338989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 895685184 + 94148209 = 29928^2 + 9703^2 .

It is a cyclic number.

It is not a de Polignac number, because 989833393 - 2¹³ = 989825201 is a prime.

It is not a weakly prime, because it can be changed into another prime (989833333) 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, 494916696 + 494916697.

It is an arithmetic number, because the mean of its divisors is an integer number (494916697).

Almost surely, 2^989833393 is an apocalyptic number.

It is an amenable number.

989833393 is a deficient number, since it is larger than the sum of its proper divisors (1).

989833393 is an equidigital number, since it uses as much as digits as its factorization.

989833393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3779136, while the sum is 55.

The square root of 989833393 is about 31461.6177746790. The cubic root of 989833393 is about 996.5995812586.

The spelling of 989833393 in words is "nine hundred eighty-nine million, eight hundred thirty-three thousand, three hundred ninety-three".