199099789 has 12 divisors (see below), whose sum is σ = 231859584. Its totient is φ = 170470104.

The previous prime is 199099783. The next prime is 199099793. The reversal of 199099789 is 987990991.

It is not a de Polignac number, because 199099789 - 2³ = 199099781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199099781) 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, 61284 + ... + 64450.

It is an arithmetic number, because the mean of its divisors is an integer number (19321632).

Almost surely, 2^199099789 is an apocalyptic number.

It is an amenable number.

199099789 is a deficient number, since it is larger than the sum of its proper divisors (32759795).

199099789 is a wasteful number, since it uses less digits than its factorization.

199099789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4464 (or 4457 counting only the distinct ones).

The product of its (nonzero) digits is 3306744, while the sum is 61.

The square root of 199099789 is about 14110.2724637053. The cubic root of 199099789 is about 583.9248169384.

The spelling of 199099789 in words is "one hundred ninety-nine million, ninety-nine thousand, seven hundred eighty-nine".