199621092 has 24 divisors (see below), whose sum is σ = 508126752. Its totient is φ = 60491200.

The previous prime is 199621091. The next prime is 199621129. The reversal of 199621092 is 290126991.

It is a self number, because there is not a number n which added to its sum of digits gives 199621092.

It is not an unprimeable number, because it can be changed into a prime (199621091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 756009 + ... + 756272.

It is an arithmetic number, because the mean of its divisors is an integer number (21171948).

Almost surely, 2^199621092 is an apocalyptic number.

199621092 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

199621092 is an abundant number, since it is smaller than the sum of its proper divisors (308505660).

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

199621092 is a wasteful number, since it uses less digits than its factorization.

199621092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512299 (or 1512297 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 199621092 is about 14128.7328518873. The cubic root of 199621092 is about 584.4340029341.

The spelling of 199621092 in words is "one hundred ninety-nine million, six hundred twenty-one thousand, ninety-two".