1142838817 has 2 divisors, whose sum is σ = 1142838818. Its totient is φ = 1142838816.

The previous prime is 1142838779. The next prime is 1142838863. The reversal of 1142838817 is 7188382411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 598829841 + 544008976 = 24471^2 + 23324^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1142838817 is a prime.

It is not a weakly prime, because it can be changed into another prime (1142838877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571419408 + 571419409.

It is an arithmetic number, because the mean of its divisors is an integer number (571419409).

Almost surely, 2^1142838817 is an apocalyptic number.

It is an amenable number.

1142838817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142838817 is an equidigital number, since it uses as much as digits as its factorization.

1142838817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86016, while the sum is 43.

The square root of 1142838817 is about 33805.8991449717. The cubic root of 1142838817 is about 1045.5103287934.

The spelling of 1142838817 in words is "one billion, one hundred forty-two million, eight hundred thirty-eight thousand, eight hundred seventeen".