998844487 has 2 divisors, whose sum is σ = 998844488. Its totient is φ = 998844486.

The previous prime is 998844433. The next prime is 998844527. The reversal of 998844487 is 784448899.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998844487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998844787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499422243 + 499422244.

It is an arithmetic number, because the mean of its divisors is an integer number (499422244).

Almost surely, 2^998844487 is an apocalyptic number.

998844487 is a deficient number, since it is larger than the sum of its proper divisors (1).

998844487 is an equidigital number, since it uses as much as digits as its factorization.

998844487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18579456, while the sum is 61.

The square root of 998844487 is about 31604.5010560205. The cubic root of 998844487 is about 999.6146805480.

The spelling of 998844487 in words is "nine hundred ninety-eight million, eight hundred forty-four thousand, four hundred eighty-seven".