1993848361 has 2 divisors, whose sum is σ = 1993848362. Its totient is φ = 1993848360.

The previous prime is 1993848331. The next prime is 1993848413. The reversal of 1993848361 is 1638483991.

It is a happy number.

It is an a-pointer prime, because the next prime (1993848413) can be obtained adding 1993848361 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1759299136 + 234549225 = 41944^2 + 15315^2 .

It is an emirp because it is prime and its reverse (1638483991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1993848361 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1993848299 and 1993848308.

It is not a weakly prime, because it can be changed into another prime (1993848331) 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, 996924180 + 996924181.

It is an arithmetic number, because the mean of its divisors is an integer number (996924181).

Almost surely, 2^1993848361 is an apocalyptic number.

It is an amenable number.

1993848361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1993848361 is an equidigital number, since it uses as much as digits as its factorization.

1993848361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 52.

The square root of 1993848361 is about 44652.5291668904. The cubic root of 1993848361 is about 1258.6279599723.

The spelling of 1993848361 in words is "one billion, nine hundred ninety-three million, eight hundred forty-eight thousand, three hundred sixty-one".