1089548969 has 2 divisors, whose sum is σ = 1089548970. Its totient is φ = 1089548968.

The previous prime is 1089548959. The next prime is 1089548987. The reversal of 1089548969 is 9698459801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1083726400 + 5822569 = 32920^2 + 2413^2 .

It is an emirp because it is prime and its reverse (9698459801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1089548969 - 2¹⁶ = 1089483433 is a prime.

It is a super-2 number, since 2×1089548969² = 2374233911697925922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1089548959) 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, 544774484 + 544774485.

It is an arithmetic number, because the mean of its divisors is an integer number (544774485).

Almost surely, 2^1089548969 is an apocalyptic number.

It is an amenable number.

1089548969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089548969 is an equidigital number, since it uses as much as digits as its factorization.

1089548969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5598720, while the sum is 59.

The square root of 1089548969 is about 33008.3166641378. The cubic root of 1089548969 is about 1029.0004973990. Note that the first 3 decimals are identical.

The spelling of 1089548969 in words is "one billion, eighty-nine million, five hundred forty-eight thousand, nine hundred sixty-nine".