1089149989 has 2 divisors, whose sum is σ = 1089149990. Its totient is φ = 1089149988.

The previous prime is 1089149959. The next prime is 1089150017. The reversal of 1089149989 is 9899419801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 730350625 + 358799364 = 27025^2 + 18942^2 .

It is a cyclic number.

It is not a de Polignac number, because 1089149989 - 2⁷ = 1089149861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1089149959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544574994 + 544574995.

It is an arithmetic number, because the mean of its divisors is an integer number (544574995).

Almost surely, 2^1089149989 is an apocalyptic number.

It is an amenable number.

1089149989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089149989 is an equidigital number, since it uses as much as digits as its factorization.

1089149989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1679616, while the sum is 58.

The square root of 1089149989 is about 33002.2724823610. The cubic root of 1089149989 is about 1028.8748794435.

The spelling of 1089149989 in words is "one billion, eighty-nine million, one hundred forty-nine thousand, nine hundred eighty-nine".