998044387 has 2 divisors, whose sum is σ = 998044388. Its totient is φ = 998044386.

The previous prime is 998044357. The next prime is 998044391. The reversal of 998044387 is 783440899.

It is a strong prime.

It is an emirp because it is prime and its reverse (783440899) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998044387 is a prime.

It is not a weakly prime, because it can be changed into another prime (998044357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499022193 + 499022194.

It is an arithmetic number, because the mean of its divisors is an integer number (499022194).

Almost surely, 2^998044387 is an apocalyptic number.

998044387 is a deficient number, since it is larger than the sum of its proper divisors (1).

998044387 is an equidigital number, since it uses as much as digits as its factorization.

998044387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The square root of 998044387 is about 31591.8405130185. The cubic root of 998044387 is about 999.3477036019.

The spelling of 998044387 in words is "nine hundred ninety-eight million, forty-four thousand, three hundred eighty-seven".