199109698 has 4 divisors (see below), whose sum is σ = 298664550. Its totient is φ = 99554848.

The previous prime is 199109681. The next prime is 199109699. The reversal of 199109698 is 896901991.

199109698 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 896901991 = 2699 ⋅332309.

It can be written as a sum of positive squares in only one way, i.e., 127080529 + 72029169 = 11273^2 + 8487^2 .

It is not an unprimeable number, because it can be changed into a prime (199109699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49777423 + ... + 49777426.

Almost surely, 2^199109698 is an apocalyptic number.

199109698 is a deficient number, since it is larger than the sum of its proper divisors (99554852).

199109698 is an equidigital number, since it uses as much as digits as its factorization.

199109698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99554851.

The product of its (nonzero) digits is 314928, while the sum is 52.

The square root of 199109698 is about 14110.6235865039. The cubic root of 199109698 is about 583.9345038983.

The spelling of 199109698 in words is "one hundred ninety-nine million, one hundred nine thousand, six hundred ninety-eight".