1999322141 has 2 divisors, whose sum is σ = 1999322142. Its totient is φ = 1999322140.

The previous prime is 1999322119. The next prime is 1999322159. The reversal of 1999322141 is 1412239991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1507768900 + 491553241 = 38830^2 + 22171^2 .

It is an emirp because it is prime and its reverse (1412239991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1999322141 - 2²⁶ = 1932213277 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 (1999322161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999661070 + 999661071.

It is an arithmetic number, because the mean of its divisors is an integer number (999661071).

Almost surely, 2^1999322141 is an apocalyptic number.

It is an amenable number.

1999322141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1999322141 is an equidigital number, since it uses as much as digits as its factorization.

1999322141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 41.

The square root of 1999322141 is about 44713.7802137104. The cubic root of 1999322141 is about 1259.7786923401.

The spelling of 1999322141 in words is "one billion, nine hundred ninety-nine million, three hundred twenty-two thousand, one hundred forty-one".