199919700 has 108 divisors (see below), whose sum is σ = 630459648. Its totient is φ = 52987200.

The previous prime is 199919689. The next prime is 199919701. The reversal of 199919700 is 7919991.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199919701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 171319 + ... + 172481.

Almost surely, 2^199919700 is an apocalyptic number.

199919700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199919700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315229824).

199919700 is an abundant number, since it is smaller than the sum of its proper divisors (430539948).

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

199919700 is a wasteful number, since it uses less digits than its factorization.

199919700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374 (or 1364 counting only the distinct ones).

The product of its (nonzero) digits is 45927, while the sum is 45.

The square root of 199919700 is about 14139.2963049793. The cubic root of 199919700 is about 584.7252709575.

The spelling of 199919700 in words is "one hundred ninety-nine million, nine hundred nineteen thousand, seven hundred".