1791118409 has 8 divisors (see below), whose sum is σ = 1807934688. Its totient is φ = 1774356640.

The previous prime is 1791118393. The next prime is 1791118423. The reversal of 1791118409 is 9048111971.

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 1791118409 - 2⁴ = 1791118393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1791118489) 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 7 ways as a sum of consecutive naturals, for example, 53954 + ... + 80580.

It is an arithmetic number, because the mean of its divisors is an integer number (225991836).

Almost surely, 2^1791118409 is an apocalyptic number.

It is an amenable number.

1791118409 is a deficient number, since it is larger than the sum of its proper divisors (16816279).

1791118409 is a wasteful number, since it uses less digits than its factorization.

1791118409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27255.

The product of its (nonzero) digits is 18144, while the sum is 41.

The square root of 1791118409 is about 42321.6068811192. The cubic root of 1791118409 is about 1214.4363723347.

The spelling of 1791118409 in words is "one billion, seven hundred ninety-one million, one hundred eighteen thousand, four hundred nine".