1143320887 has 2 divisors, whose sum is σ = 1143320888. Its totient is φ = 1143320886.

The previous prime is 1143320879. The next prime is 1143320917. The reversal of 1143320887 is 7880233411.

It is a weak prime.

It is an emirp because it is prime and its reverse (7880233411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1143320887 - 2³ = 1143320879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1143320807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571660443 + 571660444.

It is an arithmetic number, because the mean of its divisors is an integer number (571660444).

Almost surely, 2^1143320887 is an apocalyptic number.

1143320887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143320887 is an equidigital number, since it uses as much as digits as its factorization.

1143320887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 1143320887 is about 33813.0283618608. The cubic root of 1143320887 is about 1045.6573131586.

The spelling of 1143320887 in words is "one billion, one hundred forty-three million, three hundred twenty thousand, eight hundred eighty-seven".