1873223021 has 2 divisors, whose sum is σ = 1873223022. Its totient is φ = 1873223020.

The previous prime is 1873223003. The next prime is 1873223041. The reversal of 1873223021 is 1203223781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1796572996 + 76650025 = 42386^2 + 8755^2 .

It is a cyclic number.

It is not a de Polignac number, because 1873223021 - 2¹⁸ = 1872960877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1873223041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 936611510 + 936611511.

It is an arithmetic number, because the mean of its divisors is an integer number (936611511).

Almost surely, 2^1873223021 is an apocalyptic number.

It is an amenable number.

1873223021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1873223021 is an equidigital number, since it uses as much as digits as its factorization.

1873223021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 1873223021 is about 43280.7465393101. The cubic root of 1873223021 is about 1232.7163667448.

The spelling of 1873223021 in words is "one billion, eight hundred seventy-three million, two hundred twenty-three thousand, twenty-one".