989887369 has 2 divisors, whose sum is σ = 989887370. Its totient is φ = 989887368.

The previous prime is 989887337. The next prime is 989887397. The reversal of 989887369 is 963788989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 890127225 + 99760144 = 29835^2 + 9988^2 .

It is a cyclic number.

It is not a de Polignac number, because 989887369 - 2⁵ = 989887337 is a prime.

It is a super-2 number, since 2×989887369² = 1959754006611484322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (989887399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494943684 + 494943685.

It is an arithmetic number, because the mean of its divisors is an integer number (494943685).

Almost surely, 2^989887369 is an apocalyptic number.

It is an amenable number.

989887369 is a deficient number, since it is larger than the sum of its proper divisors (1).

989887369 is an equidigital number, since it uses as much as digits as its factorization.

989887369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47029248, while the sum is 67.

The square root of 989887369 is about 31462.4755701137. The cubic root of 989887369 is about 996.6176959169.

The spelling of 989887369 in words is "nine hundred eighty-nine million, eight hundred eighty-seven thousand, three hundred sixty-nine".