1819048873 has 4 divisors (see below), whose sum is σ = 1832326740. Its totient is φ = 1805771008.

The previous prime is 1819048859. The next prime is 1819048877. The reversal of 1819048873 is 3788409181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3788409181 = 3691 ⋅1026391.

It can be written as a sum of positive squares in 2 ways, for example, as 820994409 + 998054464 = 28653^2 + 31592^2 .

It is a cyclic number.

It is not a de Polignac number, because 1819048873 - 2¹⁷ = 1818917801 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1819048877) 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, 6638728 + ... + 6639001.

It is an arithmetic number, because the mean of its divisors is an integer number (458081685).

Almost surely, 2^1819048873 is an apocalyptic number.

It is an amenable number.

1819048873 is a deficient number, since it is larger than the sum of its proper divisors (13277867).

1819048873 is a wasteful number, since it uses less digits than its factorization.

1819048873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13277866.

The product of its (nonzero) digits is 387072, while the sum is 49.

The square root of 1819048873 is about 42650.3091782463. The cubic root of 1819048873 is about 1220.7164279467.

The spelling of 1819048873 in words is "one billion, eight hundred nineteen million, forty-eight thousand, eight hundred seventy-three".