1097930209 has 4 divisors (see below), whose sum is σ = 1098069040. Its totient is φ = 1097791380.

The previous prime is 1097930203. The next prime is 1097930221. The reversal of 1097930209 is 9020397901.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9020397901 = 347 ⋅25995383.

It is a cyclic number.

It is not a de Polignac number, because 1097930209 - 2⁵ = 1097930177 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (1097930203) 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, 56787 + ... + 73624.

It is an arithmetic number, because the mean of its divisors is an integer number (274517260).

Almost surely, 2^1097930209 is an apocalyptic number.

It is an amenable number.

1097930209 is a deficient number, since it is larger than the sum of its proper divisors (138831).

1097930209 is an equidigital number, since it uses as much as digits as its factorization.

1097930209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138830.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 1097930209 is about 33135.0299381184. The cubic root of 1097930209 is about 1031.6322531554.

The spelling of 1097930209 in words is "one billion, ninety-seven million, nine hundred thirty thousand, two hundred nine".