998947519 has 2 divisors, whose sum is σ = 998947520. Its totient is φ = 998947518.

The previous prime is 998947501. The next prime is 998947559. The reversal of 998947519 is 915749899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 998947519 - 2¹⁵ = 998914751 is a prime.

It is a super-2 number, since 2×998947519² = 1995792291432510722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998947559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499473759 + 499473760.

It is an arithmetic number, because the mean of its divisors is an integer number (499473760).

Almost surely, 2^998947519 is an apocalyptic number.

998947519 is a deficient number, since it is larger than the sum of its proper divisors (1).

998947519 is an equidigital number, since it uses as much as digits as its factorization.

998947519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7348320, while the sum is 61.

The square root of 998947519 is about 31606.1310349748. The cubic root of 998947519 is about 999.6490498484.

The spelling of 998947519 in words is "nine hundred ninety-eight million, nine hundred forty-seven thousand, five hundred nineteen".