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998687 is a prime number
BaseRepresentation
bin11110011110100011111
31212201221102
43303310133
5223424222
633223315
711326424
oct3636437
91781842
10998687
11622368
12401b3b
1328c751
141bdd4b
1514ad92
hexf3d1f

998687 has 2 divisors, whose sum is σ = 998688. Its totient is φ = 998686.

The previous prime is 998681. The next prime is 998689. The reversal of 998687 is 786899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998687 - 26 = 998623 is a prime.

Together with 998689, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499343 + 499344.

It is an arithmetic number, because the mean of its divisors is an integer number (499344).

2998687 is an apocalyptic number.

998687 is a deficient number, since it is larger than the sum of its proper divisors (1).

998687 is an equidigital number, since it uses as much as digits as its factorization.

998687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 47.

The square root of 998687 is about 999.3432843623. The cubic root of 998687 is about 99.9562141641.

The spelling of 998687 in words is "nine hundred ninety-eight thousand, six hundred eighty-seven".