1142689939 has 2 divisors, whose sum is σ = 1142689940. Its totient is φ = 1142689938.

The previous prime is 1142689937. The next prime is 1142690009. The reversal of 1142689939 is 9399862411.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1142689939 - 2¹ = 1142689937 is a prime.

Together with 1142689937, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1142689937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571344969 + 571344970.

It is an arithmetic number, because the mean of its divisors is an integer number (571344970).

Almost surely, 2^1142689939 is an apocalyptic number.

1142689939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142689939 is an equidigital number, since it uses as much as digits as its factorization.

1142689939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 52.

The square root of 1142689939 is about 33803.6971202855. The cubic root of 1142689939 is about 1045.4649271602.

The spelling of 1142689939 in words is "one billion, one hundred forty-two million, six hundred eighty-nine thousand, nine hundred thirty-nine".