1994101793 has 2 divisors, whose sum is σ = 1994101794. Its totient is φ = 1994101792.

The previous prime is 1994101783. The next prime is 1994101801. The reversal of 1994101793 is 3971014991.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1568793664 + 425308129 = 39608^2 + 20623^2 .

It is a cyclic number.

It is not a de Polignac number, because 1994101793 - 2⁶ = 1994101729 is a prime.

It is not a weakly prime, because it can be changed into another prime (1994101763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997050896 + 997050897.

It is an arithmetic number, because the mean of its divisors is an integer number (997050897).

Almost surely, 2^1994101793 is an apocalyptic number.

It is an amenable number.

1994101793 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994101793 is an equidigital number, since it uses as much as digits as its factorization.

1994101793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 44.

The square root of 1994101793 is about 44655.3669002954. The cubic root of 1994101793 is about 1258.6812845035.

The spelling of 1994101793 in words is "one billion, nine hundred ninety-four million, one hundred one thousand, seven hundred ninety-three".