1804040899 has 4 divisors (see below), whose sum is σ = 1898990440. Its totient is φ = 1709091360.

The previous prime is 1804040881. The next prime is 1804040911. The reversal of 1804040899 is 9980404081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1804040899 - 2¹⁷ = 1803909827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1804040099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47474742 + ... + 47474779.

It is an arithmetic number, because the mean of its divisors is an integer number (474747610).

Almost surely, 2^1804040899 is an apocalyptic number.

1804040899 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1804040899 is a deficient number, since it is larger than the sum of its proper divisors (94949541).

1804040899 is an equidigital number, since it uses as much as digits as its factorization.

1804040899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94949540.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 1804040899 is about 42474.0026251353. The cubic root of 1804040899 is about 1217.3499989337.

The spelling of 1804040899 in words is "one billion, eight hundred four million, forty thousand, eight hundred ninety-nine".