1143025909 has 2 divisors, whose sum is σ = 1143025910. Its totient is φ = 1143025908.

The previous prime is 1143025907. The next prime is 1143025943. The reversal of 1143025909 is 9095203411.

It is an a-pointer prime, because the next prime (1143025943) can be obtained adding 1143025909 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 823403025 + 319622884 = 28695^2 + 17878^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143025909 - 2¹ = 1143025907 is a prime.

Together with 1143025907, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1143025901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571512954 + 571512955.

It is an arithmetic number, because the mean of its divisors is an integer number (571512955).

Almost surely, 2^1143025909 is an apocalyptic number.

It is an amenable number.

1143025909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143025909 is an equidigital number, since it uses as much as digits as its factorization.

1143025909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 1143025909 is about 33808.6661819126. Note that the first 3 decimals coincide. The cubic root of 1143025909 is about 1045.5673785256.

The spelling of 1143025909 in words is "one billion, one hundred forty-three million, twenty-five thousand, nine hundred nine".