1143377621 has 2 divisors, whose sum is σ = 1143377622. Its totient is φ = 1143377620.

The previous prime is 1143377597. The next prime is 1143377623. The reversal of 1143377621 is 1267733411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 840130225 + 303247396 = 28985^2 + 17414^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143377621 - 2²² = 1139183317 is a prime.

Together with 1143377623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1143377623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571688810 + 571688811.

It is an arithmetic number, because the mean of its divisors is an integer number (571688811).

Almost surely, 2^1143377621 is an apocalyptic number.

It is an amenable number.

1143377621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143377621 is an equidigital number, since it uses as much as digits as its factorization.

1143377621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 35.

The square root of 1143377621 is about 33813.8672884366. The cubic root of 1143377621 is about 1045.6746087815.

The spelling of 1143377621 in words is "one billion, one hundred forty-three million, three hundred seventy-seven thousand, six hundred twenty-one".