199961934 has 32 divisors (see below), whose sum is σ = 405699840. Its totient is φ = 65697792.

The previous prime is 199961933. The next prime is 199961981. The reversal of 199961934 is 439169991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199961933) 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, 158197 + ... + 159455.

It is an arithmetic number, because the mean of its divisors is an integer number (12678120).

Almost surely, 2^199961934 is an apocalyptic number.

199961934 is an abundant number, since it is smaller than the sum of its proper divisors (205737906).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199961934 is a wasteful number, since it uses less digits than its factorization.

199961934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624.

The product of its digits is 472392, while the sum is 51.

The square root of 199961934 is about 14140.7897233500. The cubic root of 199961934 is about 584.7664434020.

The spelling of 199961934 in words is "one hundred ninety-nine million, nine hundred sixty-one thousand, nine hundred thirty-four".