998380489 has 2 divisors, whose sum is σ = 998380490. Its totient is φ = 998380488.

The previous prime is 998380457. The next prime is 998380499. The reversal of 998380489 is 984083899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 971257225 + 27123264 = 31165^2 + 5208^2 .

It is a cyclic number.

It is not a de Polignac number, because 998380489 - 2⁵ = 998380457 is a prime.

It is not a weakly prime, because it can be changed into another prime (998380429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499190244 + 499190245.

It is an arithmetic number, because the mean of its divisors is an integer number (499190245).

Almost surely, 2^998380489 is an apocalyptic number.

It is an amenable number.

998380489 is a deficient number, since it is larger than the sum of its proper divisors (1).

998380489 is an equidigital number, since it uses as much as digits as its factorization.

998380489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4478976, while the sum is 58.

The square root of 998380489 is about 31597.1595084115. The cubic root of 998380489 is about 999.4598713135.

The spelling of 998380489 in words is "nine hundred ninety-eight million, three hundred eighty thousand, four hundred eighty-nine".