1143957887 has 2 divisors, whose sum is σ = 1143957888. Its totient is φ = 1143957886.

The previous prime is 1143957869. The next prime is 1143957889. The reversal of 1143957887 is 7887593411.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1143957887 - 2¹⁴ = 1143941503 is a prime.

Together with 1143957889, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1143957889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571978943 + 571978944.

It is an arithmetic number, because the mean of its divisors is an integer number (571978944).

Almost surely, 2^1143957887 is an apocalyptic number.

1143957887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143957887 is an equidigital number, since it uses as much as digits as its factorization.

1143957887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 53.

The square root of 1143957887 is about 33822.4464963728. The cubic root of 1143957887 is about 1045.8514727195.

The spelling of 1143957887 in words is "one billion, one hundred forty-three million, nine hundred fifty-seven thousand, eight hundred eighty-seven".