1143232091 has 2 divisors, whose sum is σ = 1143232092. Its totient is φ = 1143232090.

The previous prime is 1143232087. The next prime is 1143232093. The reversal of 1143232091 is 1902323411.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1143232091 - 2² = 1143232087 is a prime.

It is a super-2 number, since 2×1143232091² = 2613959227784464562, which contains 22 as substring.

Together with 1143232093, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1143232091.

It is not a weakly prime, because it can be changed into another prime (1143232093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571616045 + 571616046.

It is an arithmetic number, because the mean of its divisors is an integer number (571616046).

Almost surely, 2^1143232091 is an apocalyptic number.

1143232091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143232091 is an equidigital number, since it uses as much as digits as its factorization.

1143232091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1143232091 is about 33811.7152921883. The cubic root of 1143232091 is about 1045.6302421378.

The spelling of 1143232091 in words is "one billion, one hundred forty-three million, two hundred thirty-two thousand, ninety-one".