1143471787 has 2 divisors, whose sum is σ = 1143471788. Its totient is φ = 1143471786.

The previous prime is 1143471761. The next prime is 1143471863. The reversal of 1143471787 is 7871743411.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1143471787 is a prime.

It is not a weakly prime, because it can be changed into another prime (1143472787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571735893 + 571735894.

It is an arithmetic number, because the mean of its divisors is an integer number (571735894).

Almost surely, 2^1143471787 is an apocalyptic number.

1143471787 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143471787 is an equidigital number, since it uses as much as digits as its factorization.

1143471787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 131712, while the sum is 43.

The square root of 1143471787 is about 33815.2596766608. The cubic root of 1143471787 is about 1045.7033144603.

The spelling of 1143471787 in words is "one billion, one hundred forty-three million, four hundred seventy-one thousand, seven hundred eighty-seven".