198120047 has 2 divisors, whose sum is σ = 198120048. Its totient is φ = 198120046.

The previous prime is 198120031. The next prime is 198120059. The reversal of 198120047 is 740021891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198120047 - 2⁴ = 198120031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198119995 and 198120022.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198120007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99060023 + 99060024.

It is an arithmetic number, because the mean of its divisors is an integer number (99060024).

Almost surely, 2^198120047 is an apocalyptic number.

198120047 is a deficient number, since it is larger than the sum of its proper divisors (1).

198120047 is an equidigital number, since it uses as much as digits as its factorization.

198120047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 198120047 is about 14075.5123174967. The cubic root of 198120047 is about 582.9654376485.

The spelling of 198120047 in words is "one hundred ninety-eight million, one hundred twenty thousand, forty-seven".