199429903 has 2 divisors, whose sum is σ = 199429904. Its totient is φ = 199429902.

The previous prime is 199429847. The next prime is 199429933. The reversal of 199429903 is 309924991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199429903 - 2¹⁷ = 199298831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199429933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99714951 + 99714952.

It is an arithmetic number, because the mean of its divisors is an integer number (99714952).

Almost surely, 2^199429903 is an apocalyptic number.

199429903 is a deficient number, since it is larger than the sum of its proper divisors (1).

199429903 is an equidigital number, since it uses as much as digits as its factorization.

199429903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 199429903 is about 14121.9652669166. The cubic root of 199429903 is about 584.2473609265.

The spelling of 199429903 in words is "one hundred ninety-nine million, four hundred twenty-nine thousand, nine hundred three".