198698429 has 2 divisors, whose sum is σ = 198698430. Its totient is φ = 198698428.

The previous prime is 198698419. The next prime is 198698441. The reversal of 198698429 is 924896891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172922500 + 25775929 = 13150^2 + 5077^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198698429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198698419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99349214 + 99349215.

It is an arithmetic number, because the mean of its divisors is an integer number (99349215).

Almost surely, 2^198698429 is an apocalyptic number.

It is an amenable number.

198698429 is a deficient number, since it is larger than the sum of its proper divisors (1).

198698429 is an equidigital number, since it uses as much as digits as its factorization.

198698429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 56.

The square root of 198698429 is about 14096.0430263248. The cubic root of 198698429 is about 583.5321801187.

The spelling of 198698429 in words is "one hundred ninety-eight million, six hundred ninety-eight thousand, four hundred twenty-nine".