1973185109 has 8 divisors (see below), whose sum is σ = 2285960640. Its totient is φ = 1668132576.

The previous prime is 1973185073. The next prime is 1973185129. The reversal of 1973185109 is 9015813791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1973185109 - 2¹² = 1973181013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1973185109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1973185129) 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 in 7 ways as a sum of consecutive naturals, for example, 1930199 + ... + 1931220.

It is an arithmetic number, because the mean of its divisors is an integer number (285745080).

Almost surely, 2^1973185109 is an apocalyptic number.

It is an amenable number.

1973185109 is a deficient number, since it is larger than the sum of its proper divisors (312775531).

1973185109 is an equidigital number, since it uses as much as digits as its factorization.

1973185109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3861499.

The product of its (nonzero) digits is 68040, while the sum is 44.

The square root of 1973185109 is about 44420.5482744191. The cubic root of 1973185109 is about 1254.2649217244.

The spelling of 1973185109 in words is "one billion, nine hundred seventy-three million, one hundred eighty-five thousand, one hundred nine".