989040919 has 2 divisors, whose sum is σ = 989040920. Its totient is φ = 989040918.

The previous prime is 989040889. The next prime is 989040929. The reversal of 989040919 is 919040989.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 989040919 - 2¹³ = 989032727 is a prime.

It is a super-2 number, since 2×989040919² = 1956403878912729122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989040929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494520459 + 494520460.

It is an arithmetic number, because the mean of its divisors is an integer number (494520460).

Almost surely, 2^989040919 is an apocalyptic number.

989040919 is a deficient number, since it is larger than the sum of its proper divisors (1).

989040919 is an equidigital number, since it uses as much as digits as its factorization.

989040919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 49.

The square root of 989040919 is about 31449.0209545544. The cubic root of 989040919 is about 996.3335465483. Note that the first 3 decimals are identical.

The spelling of 989040919 in words is "nine hundred eighty-nine million, forty thousand, nine hundred nineteen".