1993904141 has 2 divisors, whose sum is σ = 1993904142. Its totient is φ = 1993904140.

The previous prime is 1993904123. The next prime is 1993904167. The reversal of 1993904141 is 1414093991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1951784041 + 42120100 = 44179^2 + 6490^2 .

It is a cyclic number.

It is not a de Polignac number, because 1993904141 - 2¹⁰ = 1993903117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1993904111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996952070 + 996952071.

It is an arithmetic number, because the mean of its divisors is an integer number (996952071).

Almost surely, 2^1993904141 is an apocalyptic number.

It is an amenable number.

1993904141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1993904141 is an equidigital number, since it uses as much as digits as its factorization.

1993904141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 1993904141 is about 44653.1537632002. The cubic root of 1993904141 is about 1258.6396970088.

The spelling of 1993904141 in words is "one billion, nine hundred ninety-three million, nine hundred four thousand, one hundred forty-one".