1993795841 has 2 divisors, whose sum is σ = 1993795842. Its totient is φ = 1993795840.

The previous prime is 1993795831. The next prime is 1993795861. The reversal of 1993795841 is 1485973991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1303210000 + 690585841 = 36100^2 + 26279^2 .

It is an emirp because it is prime and its reverse (1485973991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1993795841 - 2¹⁴ = 1993779457 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 (1993795831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996897920 + 996897921.

It is an arithmetic number, because the mean of its divisors is an integer number (996897921).

Almost surely, 2^1993795841 is an apocalyptic number.

It is an amenable number.

1993795841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1993795841 is an equidigital number, since it uses as much as digits as its factorization.

1993795841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 56.

The square root of 1993795841 is about 44651.9410664307. The cubic root of 1993795841 is about 1258.6169086938.

The spelling of 1993795841 in words is "one billion, nine hundred ninety-three million, seven hundred ninety-five thousand, eight hundred forty-one".