1143656329 has 2 divisors, whose sum is σ = 1143656330. Its totient is φ = 1143656328.

The previous prime is 1143656281. The next prime is 1143656357. The reversal of 1143656329 is 9236563411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1116896400 + 26759929 = 33420^2 + 5173^2 .

It is an emirp because it is prime and its reverse (9236563411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1143656329 - 2⁷ = 1143656201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1143656291 and 1143656300.

It is not a weakly prime, because it can be changed into another prime (1143656359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571828164 + 571828165.

It is an arithmetic number, because the mean of its divisors is an integer number (571828165).

Almost surely, 2^1143656329 is an apocalyptic number.

It is an amenable number.

1143656329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143656329 is an equidigital number, since it uses as much as digits as its factorization.

1143656329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 40.

The square root of 1143656329 is about 33817.9882459025. The cubic root of 1143656329 is about 1045.7595658994.

The spelling of 1143656329 in words is "one billion, one hundred forty-three million, six hundred fifty-six thousand, three hundred twenty-nine".