1947599884049 has 2 divisors, whose sum is σ = 1947599884050. Its totient is φ = 1947599884048.

The previous prime is 1947599883967. The next prime is 1947599884057. The reversal of 1947599884049 is 9404889957491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1136051144449 + 811548739600 = 1065857^2 + 900860^2 .

It is a cyclic number.

It is not a de Polignac number, because 1947599884049 - 2¹⁶ = 1947599818513 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1947599884099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 973799942024 + 973799942025.

It is an arithmetic number, because the mean of its divisors is an integer number (973799942025).

Almost surely, 2^{1947599884049} is an apocalyptic number.

It is an amenable number.

1947599884049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1947599884049 is an equidigital number, since it uses as much as digits as its factorization.

1947599884049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 940584960, while the sum is 77.

The spelling of 1947599884049 in words is "one trillion, nine hundred forty-seven billion, five hundred ninety-nine million, eight hundred eighty-four thousand, forty-nine".