998279507 has 2 divisors, whose sum is σ = 998279508. Its totient is φ = 998279506.

The previous prime is 998279501. The next prime is 998279519. The reversal of 998279507 is 705972899.

It is a weak prime.

It is an emirp because it is prime and its reverse (705972899) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998279507 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (998279501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499139753 + 499139754.

It is an arithmetic number, because the mean of its divisors is an integer number (499139754).

Almost surely, 2^998279507 is an apocalyptic number.

998279507 is a deficient number, since it is larger than the sum of its proper divisors (1).

998279507 is an equidigital number, since it uses as much as digits as its factorization.

998279507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2857680, while the sum is 56.

The square root of 998279507 is about 31595.5615079080. The cubic root of 998279507 is about 999.4261731190.

The spelling of 998279507 in words is "nine hundred ninety-eight million, two hundred seventy-nine thousand, five hundred seven".