1969847237639 has 2 divisors, whose sum is σ = 1969847237640. Its totient is φ = 1969847237638.

The previous prime is 1969847237599. The next prime is 1969847237641. The reversal of 1969847237639 is 9367327489691.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1969847237639 is a prime.

Together with 1969847237641, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1969847227639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984923618819 + 984923618820.

It is an arithmetic number, because the mean of its divisors is an integer number (984923618820).

Almost surely, 2^{1969847237639} is an apocalyptic number.

1969847237639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1969847237639 is an equidigital number, since it uses as much as digits as its factorization.

1969847237639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 740710656, while the sum is 74.

The spelling of 1969847237639 in words is "one trillion, nine hundred sixty-nine billion, eight hundred forty-seven million, two hundred thirty-seven thousand, six hundred thirty-nine".