1143821953 has 2 divisors, whose sum is σ = 1143821954. Its totient is φ = 1143821952.

The previous prime is 1143821873. The next prime is 1143821957. The reversal of 1143821953 is 3591283411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1118701809 + 25120144 = 33447^2 + 5012^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143821953 - 2²⁹ = 606951041 is a prime.

It is not a weakly prime, because it can be changed into another prime (1143821957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571910976 + 571910977.

It is an arithmetic number, because the mean of its divisors is an integer number (571910977).

Almost surely, 2^1143821953 is an apocalyptic number.

It is an amenable number.

1143821953 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143821953 is an equidigital number, since it uses as much as digits as its factorization.

1143821953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 37.

The square root of 1143821953 is about 33820.4369132038. The cubic root of 1143821953 is about 1045.8100456684.

The spelling of 1143821953 in words is "one billion, one hundred forty-three million, eight hundred twenty-one thousand, nine hundred fifty-three".