199429881 has 16 divisors (see below), whose sum is σ = 304149504. Its totient is φ = 113863824.

The previous prime is 199429847. The next prime is 199429903. The reversal of 199429881 is 188924991.

It is not a de Polignac number, because 199429881 - 2⁷ = 199429753 is a prime.

It is a super-2 number, since 2×199429881² = 79544554871348322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (199429981) 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 in 15 ways as a sum of consecutive naturals, for example, 27106 + ... + 33668.

It is an arithmetic number, because the mean of its divisors is an integer number (19009344).

Almost surely, 2^199429881 is an apocalyptic number.

It is an amenable number.

199429881 is a deficient number, since it is larger than the sum of its proper divisors (104719623).

199429881 is a wasteful number, since it uses less digits than its factorization.

199429881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8020.

The product of its digits is 373248, while the sum is 51.

The square root of 199429881 is about 14121.9644879882. The cubic root of 199429881 is about 584.2473394429.

The spelling of 199429881 in words is "one hundred ninety-nine million, four hundred twenty-nine thousand, eight hundred eighty-one".