1143412981 has 2 divisors, whose sum is σ = 1143412982. Its totient is φ = 1143412980.

The previous prime is 1143412969. The next prime is 1143413071. The reversal of 1143412981 is 1892143411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1090980900 + 52432081 = 33030^2 + 7241^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143412981 - 2¹³ = 1143404789 is a prime.

It is a super-2 number, since 2×1143412981² = 2614786490238612722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1143412901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571706490 + 571706491.

It is an arithmetic number, because the mean of its divisors is an integer number (571706491).

Almost surely, 2^1143412981 is an apocalyptic number.

It is an amenable number.

1143412981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143412981 is an equidigital number, since it uses as much as digits as its factorization.

1143412981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 34.

The square root of 1143412981 is about 33814.3901467999. The cubic root of 1143412981 is about 1045.6853881520.

The spelling of 1143412981 in words is "one billion, one hundred forty-three million, four hundred twelve thousand, nine hundred eighty-one".