2142969449 has 2 divisors, whose sum is σ = 2142969450. Its totient is φ = 2142969448.

The previous prime is 2142969443. The next prime is 2142969463. The reversal of 2142969449 is 9449692412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1359249424 + 783720025 = 36868^2 + 27995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2142969449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2142969397 and 2142969406.

It is not a weakly prime, because it can be changed into another prime (2142969443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071484724 + 1071484725.

It is an arithmetic number, because the mean of its divisors is an integer number (1071484725).

Almost surely, 2^2142969449 is an apocalyptic number.

It is an amenable number.

2142969449 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142969449 is an equidigital number, since it uses as much as digits as its factorization.

2142969449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 50.

The square root of 2142969449 is about 46292.2180177187. The cubic root of 2142969449 is about 1289.2545116781.

The spelling of 2142969449 in words is "two billion, one hundred forty-two million, nine hundred sixty-nine thousand, four hundred forty-nine".