198120007 has 2 divisors, whose sum is σ = 198120008. Its totient is φ = 198120006.

The previous prime is 198119983. The next prime is 198120019. The reversal of 198120007 is 700021891.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198120007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198120047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99060003 + 99060004.

It is an arithmetic number, because the mean of its divisors is an integer number (99060004).

Almost surely, 2^198120007 is an apocalyptic number.

198120007 is the 8127-th hex number.

198120007 is a deficient number, since it is larger than the sum of its proper divisors (1).

198120007 is an equidigital number, since it uses as much as digits as its factorization.

198120007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 198120007 is about 14075.5108965892. The cubic root of 198120007 is about 582.9653984154.

Adding to 198120007 its reverse (700021891), we get a palindrome (898141898).

The spelling of 198120007 in words is "one hundred ninety-eight million, one hundred twenty thousand, seven".