1973109 has 4 divisors (see below), whose sum is σ = 2630816. Its totient is φ = 1315404.

The previous prime is 1973087. The next prime is 1973113. The reversal of 1973109 is 9013791.

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 1973109 - 2⁷ = 1972981 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

1973109 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1973129) 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, 328849 + ... + 328854.

It is an arithmetic number, because the mean of its divisors is an integer number (657704).

2^1973109 is an apocalyptic number.

It is an amenable number.

1973109 is a deficient number, since it is larger than the sum of its proper divisors (657707).

1973109 is an equidigital number, since it uses as much as digits as its factorization.

1973109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657706.

The product of its (nonzero) digits is 1701, while the sum is 30.

The square root of 1973109 is about 1404.6739835279. The cubic root of 1973109 is about 125.4248795162.

The spelling of 1973109 in words is "one million, nine hundred seventy-three thousand, one hundred nine".