2142404689 has 2 divisors, whose sum is σ = 2142404690. Its totient is φ = 2142404688.

The previous prime is 2142404669. The next prime is 2142404723. The reversal of 2142404689 is 9864042412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1667905600 + 474499089 = 40840^2 + 21783^2 .

It is a cyclic number.

It is not a de Polignac number, because 2142404689 - 2¹¹ = 2142402641 is a prime.

It is not a weakly prime, because it can be changed into another prime (2142404669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071202344 + 1071202345.

It is an arithmetic number, because the mean of its divisors is an integer number (1071202345).

Almost surely, 2^2142404689 is an apocalyptic number.

It is an amenable number.

2142404689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142404689 is an equidigital number, since it uses as much as digits as its factorization.

2142404689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 2142404689 is about 46286.1176704204. The cubic root of 2142404689 is about 1289.1412446488.

The spelling of 2142404689 in words is "two billion, one hundred forty-two million, four hundred four thousand, six hundred eighty-nine".