1089973 has 4 divisors (see below), whose sum is σ = 1147360. Its totient is φ = 1032588.

The previous prime is 1089967. The next prime is 1090003. The reversal of 1089973 is 3799801.

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 a cyclic number.

It is not a de Polignac number, because 1089973 - 2⁵ = 1089941 is a prime.

It is a super-2 number, since 2×1089973² = 2376082281458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28665 + ... + 28702.

It is an arithmetic number, because the mean of its divisors is an integer number (286840).

2^1089973 is an apocalyptic number.

It is an amenable number.

1089973 is a deficient number, since it is larger than the sum of its proper divisors (57387).

1089973 is an equidigital number, since it uses as much as digits as its factorization.

1089973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57386.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 1089973 is about 1044.0177201561. The cubic root of 1089973 is about 102.9133968995.

Subtracting from 1089973 its sum of digits (37), we obtain a square (1089936 = 1044²).

The spelling of 1089973 in words is "one million, eighty-nine thousand, nine hundred seventy-three".