998669179 has 2 divisors, whose sum is σ = 998669180. Its totient is φ = 998669178.

The previous prime is 998669171. The next prime is 998669209. The reversal of 998669179 is 971966899.

It is a weak prime.

It is an emirp because it is prime and its reverse (971966899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 998669179 - 2³ = 998669171 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 998669179.

It is not a weakly prime, because it can be changed into another prime (998669171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499334589 + 499334590.

It is an arithmetic number, because the mean of its divisors is an integer number (499334590).

Almost surely, 2^998669179 is an apocalyptic number.

998669179 is a deficient number, since it is larger than the sum of its proper divisors (1).

998669179 is an equidigital number, since it uses as much as digits as its factorization.

998669179 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13226976, while the sum is 64.

The square root of 998669179 is about 31601.7274686053. The cubic root of 998669179 is about 999.5561960672.

The spelling of 998669179 in words is "nine hundred ninety-eight million, six hundred sixty-nine thousand, one hundred seventy-nine".