998846987 has 2 divisors, whose sum is σ = 998846988. Its totient is φ = 998846986.

The previous prime is 998846909. The next prime is 998847041. The reversal of 998846987 is 789648899.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998846987 is a prime.

It is not a weakly prime, because it can be changed into another prime (998846687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499423493 + 499423494.

It is an arithmetic number, because the mean of its divisors is an integer number (499423494).

Almost surely, 2^998846987 is an apocalyptic number.

998846987 is a deficient number, since it is larger than the sum of its proper divisors (1).

998846987 is an equidigital number, since it uses as much as digits as its factorization.

998846987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62705664, while the sum is 68.

The square root of 998846987 is about 31604.5406073241. The cubic root of 998846987 is about 999.6155145232.

The spelling of 998846987 in words is "nine hundred ninety-eight million, eight hundred forty-six thousand, nine hundred eighty-seven".