199697916 has 48 divisors (see below), whose sum is σ = 512563968. Its totient is φ = 60509680.

The previous prime is 199697903. The next prime is 199698019. The reversal of 199697916 is 619796991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9721 + ... + 22223.

It is an arithmetic number, because the mean of its divisors is an integer number (10678416).

Almost surely, 2^199697916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199697916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256281984).

199697916 is an abundant number, since it is smaller than the sum of its proper divisors (312866052).

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

199697916 is a wasteful number, since it uses less digits than its factorization.

199697916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12543 (or 12519 counting only the distinct ones).

The product of its digits is 1653372, while the sum is 57.

The square root of 199697916 is about 14131.4513055100. The cubic root of 199697916 is about 584.5089662874.

The spelling of 199697916 in words is "one hundred ninety-nine million, six hundred ninety-seven thousand, nine hundred sixteen".