1804918197 has 8 divisors (see below), whose sum is σ = 2423871520. Its totient is φ = 1194621840.

The previous prime is 1804918187. The next prime is 1804918229. The reversal of 1804918197 is 7918194081.

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

It is not a de Polignac number, because 1804918197 - 2⁸ = 1804917941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1804918187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2163754 + ... + 2164587.

It is an arithmetic number, because the mean of its divisors is an integer number (302983940).

Almost surely, 2^1804918197 is an apocalyptic number.

It is an amenable number.

1804918197 is a deficient number, since it is larger than the sum of its proper divisors (618953323).

1804918197 is a wasteful number, since it uses less digits than its factorization.

1804918197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4328483.

The product of its (nonzero) digits is 145152, while the sum is 48.

The square root of 1804918197 is about 42484.3288401735. The cubic root of 1804918197 is about 1217.5472977956.

The spelling of 1804918197 in words is "one billion, eight hundred four million, nine hundred eighteen thousand, one hundred ninety-seven".