998429 has 2 divisors, whose sum is σ = 998430. Its totient is φ = 998428.

The previous prime is 998423. The next prime is 998443. The reversal of 998429 is 924899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 511225 + 487204 = 715^2 + 698^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998429 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499214 + 499215.

It is an arithmetic number, because the mean of its divisors is an integer number (499215).

2⁹⁹⁸⁴²⁹ is an apocalyptic number.

It is an amenable number.

998429 is a deficient number, since it is larger than the sum of its proper divisors (1).

998429 is an equidigital number, since it uses as much as digits as its factorization.

998429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 41.

The square root of 998429 is about 999.2141912523. The cubic root of 998429 is about 99.9476058867.

The spelling of 998429 in words is "nine hundred ninety-eight thousand, four hundred twenty-nine".