198102001 has 4 divisors (see below), whose sum is σ = 198891504. Its totient is φ = 197312500.

The previous prime is 198101977. The next prime is 198102011. The reversal of 198102001 is 100201891.

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.

It is a cyclic number.

It is not a de Polignac number, because 198102001 - 2⁹ = 198101489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198102011) 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, 394375 + ... + 394876.

It is an arithmetic number, because the mean of its divisors is an integer number (49722876).

Almost surely, 2^198102001 is an apocalyptic number.

It is an amenable number.

198102001 is a deficient number, since it is larger than the sum of its proper divisors (789503).

198102001 is an equidigital number, since it uses as much as digits as its factorization.

198102001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789502.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 198102001 is about 14074.8712605125. The cubic root of 198102001 is about 582.9477370778.

Adding to 198102001 its reverse (100201891), we get a palindrome (298303892).

The spelling of 198102001 in words is "one hundred ninety-eight million, one hundred two thousand, one".