1089209973 has 4 divisors (see below), whose sum is σ = 1452279968. Its totient is φ = 726139980.

The previous prime is 1089209969. The next prime is 1089209981. The reversal of 1089209973 is 3799029801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1089209973 - 2² = 1089209969 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089209923) 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 in 3 ways as a sum of consecutive naturals, for example, 181534993 + ... + 181534998.

It is an arithmetic number, because the mean of its divisors is an integer number (363069992).

Almost surely, 2^1089209973 is an apocalyptic number.

It is an amenable number.

1089209973 is a deficient number, since it is larger than the sum of its proper divisors (363069995).

1089209973 is an equidigital number, since it uses as much as digits as its factorization.

1089209973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363069994.

The product of its (nonzero) digits is 244944, while the sum is 48.

The square root of 1089209973 is about 33003.1812557517. The cubic root of 1089209973 is about 1028.8937672301.

The spelling of 1089209973 in words is "one billion, eighty-nine million, two hundred nine thousand, nine hundred seventy-three".