939769889 has 2 divisors, whose sum is σ = 939769890. Its totient is φ = 939769888.

The previous prime is 939769861. The next prime is 939769913. The reversal of 939769889 is 988967939.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 896104225 + 43665664 = 29935^2 + 6608^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-939769889 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (939769819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469884944 + 469884945.

It is an arithmetic number, because the mean of its divisors is an integer number (469884945).

Almost surely, 2^939769889 is an apocalyptic number.

It is an amenable number.

939769889 is a deficient number, since it is larger than the sum of its proper divisors (1).

939769889 is an equidigital number, since it uses as much as digits as its factorization.

939769889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52907904, while the sum is 68.

The square root of 939769889 is about 30655.6665071892. Note that the first 3 decimals coincide. The cubic root of 939769889 is about 979.5061683130.

The spelling of 939769889 in words is "nine hundred thirty-nine million, seven hundred sixty-nine thousand, eight hundred eighty-nine".