198102049 has 4 divisors (see below), whose sum is σ = 201058864. Its totient is φ = 195145236.

The previous prime is 198102031. The next prime is 198102053. The reversal of 198102049 is 940201891.

198102049 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 940201891 = 97 ⋅9692803.

It is a cyclic number.

It is not a de Polignac number, because 198102049 - 2⁹ = 198101537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198102089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1478307 + ... + 1478440.

It is an arithmetic number, because the mean of its divisors is an integer number (50264716).

Almost surely, 2^198102049 is an apocalyptic number.

It is an amenable number.

198102049 is a deficient number, since it is larger than the sum of its proper divisors (2956815).

198102049 is an equidigital number, since it uses as much as digits as its factorization.

198102049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2956814.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 198102049 is about 14074.8729656789. The cubic root of 198102049 is about 582.9477841604.

The spelling of 198102049 in words is "one hundred ninety-eight million, one hundred two thousand, forty-nine".