998947 has 2 divisors, whose sum is σ = 998948. Its totient is φ = 998946.

The previous prime is 998941. The next prime is 998951. The reversal of 998947 is 749899.

It is a strong prime.

It is an emirp because it is prime and its reverse (749899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 998947 - 2⁷ = 998819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 998897 and 998906.

It is not a weakly prime, because it can be changed into another prime (998941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499473 + 499474.

It is an arithmetic number, because the mean of its divisors is an integer number (499474).

2⁹⁹⁸⁹⁴⁷ is an apocalyptic number.

998947 is a deficient number, since it is larger than the sum of its proper divisors (1).

998947 is an equidigital number, since it uses as much as digits as its factorization.

998947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 46.

The square root of 998947 is about 999.4733613259. The cubic root of 998947 is about 99.9648876727.

The spelling of 998947 in words is "nine hundred ninety-eight thousand, nine hundred forty-seven".