1872816049 has 4 divisors (see below), whose sum is σ = 2016878836. Its totient is φ = 1728753264.

The previous prime is 1872816007. The next prime is 1872816059. The reversal of 1872816049 is 9406182781.

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

It can be written as a sum of positive squares in 2 ways, for example, as 598683024 + 1274133025 = 24468^2 + 35695^2 .

It is a cyclic number.

It is not a de Polignac number, because 1872816049 - 2¹¹ = 1872814001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1872816059) 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, 72031374 + ... + 72031399.

It is an arithmetic number, because the mean of its divisors is an integer number (504219709).

Almost surely, 2^1872816049 is an apocalyptic number.

It is an amenable number.

1872816049 is a deficient number, since it is larger than the sum of its proper divisors (144062787).

1872816049 is a wasteful number, since it uses less digits than its factorization.

1872816049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144062786.

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 1872816049 is about 43276.0447476430. The cubic root of 1872816049 is about 1232.6270879323.

The spelling of 1872816049 in words is "one billion, eight hundred seventy-two million, eight hundred sixteen thousand, forty-nine".