2065243639 has 2 divisors, whose sum is σ = 2065243640. Its totient is φ = 2065243638.

The previous prime is 2065243597. The next prime is 2065243651. The reversal of 2065243639 is 9363425602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2065243639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2065243679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1032621819 + 1032621820.

It is an arithmetic number, because the mean of its divisors is an integer number (1032621820).

Almost surely, 2^2065243639 is an apocalyptic number.

2065243639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2065243639 is an equidigital number, since it uses as much as digits as its factorization.

2065243639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 40.

The square root of 2065243639 is about 45444.9517438406. The cubic root of 2065243639 is about 1273.4750218708.

The spelling of 2065243639 in words is "two billion, sixty-five million, two hundred forty-three thousand, six hundred thirty-nine".