998687419 has 2 divisors, whose sum is σ = 998687420. Its totient is φ = 998687418.

The previous prime is 998687411. The next prime is 998687449. The reversal of 998687419 is 914786899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 998687419 - 2³ = 998687411 is a prime.

It is a super-2 number, since 2×998687419² = 1994753121737763122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (998687411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499343709 + 499343710.

It is an arithmetic number, because the mean of its divisors is an integer number (499343710).

Almost surely, 2^998687419 is an apocalyptic number.

998687419 is a deficient number, since it is larger than the sum of its proper divisors (1).

998687419 is an equidigital number, since it uses as much as digits as its factorization.

998687419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7838208, while the sum is 61.

The square root of 998687419 is about 31602.0160591061. The cubic root of 998687419 is about 999.5622814304.

The spelling of 998687419 in words is "nine hundred ninety-eight million, six hundred eighty-seven thousand, four hundred nineteen".