998531047 has 2 divisors, whose sum is σ = 998531048. Its totient is φ = 998531046.

The previous prime is 998531041. The next prime is 998531063. The reversal of 998531047 is 740135899.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 998531047 - 2²⁷ = 864313319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 998530988 and 998531006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998531041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499265523 + 499265524.

It is an arithmetic number, because the mean of its divisors is an integer number (499265524).

Almost surely, 2^998531047 is an apocalyptic number.

998531047 is a deficient number, since it is larger than the sum of its proper divisors (1).

998531047 is an equidigital number, since it uses as much as digits as its factorization.

998531047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 998531047 is about 31599.5418795906. The cubic root of 998531047 is about 999.5101090460.

The spelling of 998531047 in words is "nine hundred ninety-eight million, five hundred thirty-one thousand, forty-seven".