1089973813 has 2 divisors, whose sum is σ = 1089973814. Its totient is φ = 1089973812.

The previous prime is 1089973811. The next prime is 1089973879. The reversal of 1089973813 is 3183799801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1083858084 + 6115729 = 32922^2 + 2473^2 .

It is a cyclic number.

It is not a de Polignac number, because 1089973813 - 2¹ = 1089973811 is a prime.

Together with 1089973811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1089973811) 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, 544986906 + 544986907.

It is an arithmetic number, because the mean of its divisors is an integer number (544986907).

Almost surely, 2^1089973813 is an apocalyptic number.

It is an amenable number.

1089973813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089973813 is an equidigital number, since it uses as much as digits as its factorization.

1089973813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 49.

The square root of 1089973813 is about 33014.7514453767. The cubic root of 1089973813 is about 1029.1342248683.

The spelling of 1089973813 in words is "one billion, eighty-nine million, nine hundred seventy-three thousand, eight hundred thirteen".