2289139661 has 2 divisors, whose sum is σ = 2289139662. Its totient is φ = 2289139660.

The previous prime is 2289139637. The next prime is 2289139687. The reversal of 2289139661 is 1669319822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1589537161 + 699602500 = 39869^2 + 26450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2289139661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2289139631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1144569830 + 1144569831.

It is an arithmetic number, because the mean of its divisors is an integer number (1144569831).

Almost surely, 2^2289139661 is an apocalyptic number.

It is an amenable number.

2289139661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2289139661 is an equidigital number, since it uses as much as digits as its factorization.

2289139661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 47.

The square root of 2289139661 is about 47844.9543943768. The cubic root of 2289139661 is about 1317.9252033590.

The spelling of 2289139661 in words is "two billion, two hundred eighty-nine million, one hundred thirty-nine thousand, six hundred sixty-one".