1872552821 has 2 divisors, whose sum is σ = 1872552822. Its totient is φ = 1872552820.

The previous prime is 1872552767. The next prime is 1872552833. The reversal of 1872552821 is 1282552781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1311526225 + 561026596 = 36215^2 + 23686^2 .

It is an emirp because it is prime and its reverse (1282552781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1872552821 - 2³⁰ = 798810997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1872552421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 936276410 + 936276411.

It is an arithmetic number, because the mean of its divisors is an integer number (936276411).

Almost surely, 2^1872552821 is an apocalyptic number.

It is an amenable number.

1872552821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1872552821 is an equidigital number, since it uses as much as digits as its factorization.

1872552821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 89600, while the sum is 41.

The square root of 1872552821 is about 43273.0033739282. The cubic root of 1872552821 is about 1232.5693358347.

The spelling of 1872552821 in words is "one billion, eight hundred seventy-two million, five hundred fifty-two thousand, eight hundred twenty-one".