1994118629 has 2 divisors, whose sum is σ = 1994118630. Its totient is φ = 1994118628.

The previous prime is 1994118613. The next prime is 1994118631. The reversal of 1994118629 is 9268114991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1522794529 + 471324100 = 39023^2 + 21710^2 .

It is a cyclic number.

It is not a de Polignac number, because 1994118629 - 2⁴ = 1994118613 is a prime.

Together with 1994118631, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1994118689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997059314 + 997059315.

It is an arithmetic number, because the mean of its divisors is an integer number (997059315).

Almost surely, 2^1994118629 is an apocalyptic number.

It is an amenable number.

1994118629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994118629 is an equidigital number, since it uses as much as digits as its factorization.

1994118629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 50.

The square root of 1994118629 is about 44655.5554102734. Note that the first 3 decimals coincide. The cubic root of 1994118629 is about 1258.6848267999.

The spelling of 1994118629 in words is "one billion, nine hundred ninety-four million, one hundred eighteen thousand, six hundred twenty-nine".