199523830 has 16 divisors (see below), whose sum is σ = 391792464. Its totient is φ = 72554080.

The previous prime is 199523813. The next prime is 199523837. The reversal of 199523830 is 38325991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199523837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 906817 + ... + 907036.

It is an arithmetic number, because the mean of its divisors is an integer number (24487029).

Almost surely, 2^199523830 is an apocalyptic number.

199523830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199523830 is a deficient number, since it is larger than the sum of its proper divisors (192268634).

199523830 is a wasteful number, since it uses less digits than its factorization.

199523830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1813871.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 199523830 is about 14125.2904394919. The cubic root of 199523830 is about 584.3390689872.

The spelling of 199523830 in words is "one hundred ninety-nine million, five hundred twenty-three thousand, eight hundred thirty".