199118629 has 2 divisors, whose sum is σ = 199118630. Its totient is φ = 199118628.

The previous prime is 199118627. The next prime is 199118723. The reversal of 199118629 is 926811991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193349025 + 5769604 = 13905^2 + 2402^2 .

It is a cyclic number.

It is not a de Polignac number, because 199118629 - 2¹ = 199118627 is a prime.

Together with 199118627, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199118627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99559314 + 99559315.

It is an arithmetic number, because the mean of its divisors is an integer number (99559315).

Almost surely, 2^199118629 is an apocalyptic number.

It is an amenable number.

199118629 is a deficient number, since it is larger than the sum of its proper divisors (1).

199118629 is an equidigital number, since it uses as much as digits as its factorization.

199118629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 46.

The square root of 199118629 is about 14110.9400466447. The cubic root of 199118629 is about 583.9432344978.

It can be divided in two parts, 199 and 118629, that added together give a triangular number (118828 = T₄₈₇).

The spelling of 199118629 in words is "one hundred ninety-nine million, one hundred eighteen thousand, six hundred twenty-nine".