1143827969 has 2 divisors, whose sum is σ = 1143827970. Its totient is φ = 1143827968.

The previous prime is 1143827959. The next prime is 1143827981. The reversal of 1143827969 is 9697283411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 756250000 + 387577969 = 27500^2 + 19687^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1143827969 is a prime.

It is a super-2 number, since 2×1143827969² = 2616684845333329922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1143827959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571913984 + 571913985.

It is an arithmetic number, because the mean of its divisors is an integer number (571913985).

Almost surely, 2^1143827969 is an apocalyptic number.

It is an amenable number.

1143827969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143827969 is an equidigital number, since it uses as much as digits as its factorization.

1143827969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 50.

The square root of 1143827969 is about 33820.5258533926. The cubic root of 1143827969 is about 1045.8118791653.

The spelling of 1143827969 in words is "one billion, one hundred forty-three million, eight hundred twenty-seven thousand, nine hundred sixty-nine".