199899469 has 12 divisors (see below), whose sum is σ = 253676448. Its totient is φ = 155765400.

The previous prime is 199899461. The next prime is 199899473. The reversal of 199899469 is 964998991.

It is not a de Polignac number, because 199899469 - 2³ = 199899461 is a prime.

It is a super-2 number, since 2×199899469² = 79919595412963922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 199899469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199899461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184897 + ... + 185974.

It is an arithmetic number, because the mean of its divisors is an integer number (21139704).

Almost surely, 2^199899469 is an apocalyptic number.

It is an amenable number.

199899469 is a deficient number, since it is larger than the sum of its proper divisors (53776979).

199899469 is a wasteful number, since it uses less digits than its factorization.

199899469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370896 (or 370889 counting only the distinct ones).

The product of its digits is 11337408, while the sum is 64.

The square root of 199899469 is about 14138.5808693801. The cubic root of 199899469 is about 584.7055464114.

The spelling of 199899469 in words is "one hundred ninety-nine million, eight hundred ninety-nine thousand, four hundred sixty-nine".