198713161 has 2 divisors, whose sum is σ = 198713162. Its totient is φ = 198713160.

The previous prime is 198713117. The next prime is 198713269. The reversal of 198713161 is 161317891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135606025 + 63107136 = 11645^2 + 7944^2 .

It is a cyclic number.

It is not a de Polignac number, because 198713161 - 2⁷ = 198713033 is a prime.

It is a super-2 number, since 2×198713161² = 78973840709223842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 198713161.

It is not a weakly prime, because it can be changed into another prime (198719161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99356580 + 99356581.

It is an arithmetic number, because the mean of its divisors is an integer number (99356581).

Almost surely, 2^198713161 is an apocalyptic number.

It is an amenable number.

198713161 is a deficient number, since it is larger than the sum of its proper divisors (1).

198713161 is an equidigital number, since it uses as much as digits as its factorization.

198713161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 37.

The square root of 198713161 is about 14096.5655746355. The cubic root of 198713161 is about 583.5466012755.

It can be divided in two parts, 19871 and 3161, that added together give a palindrome (23032).

The spelling of 198713161 in words is "one hundred ninety-eight million, seven hundred thirteen thousand, one hundred sixty-one".