9998619 has 8 divisors (see below), whose sum is σ = 13350480. Its totient is φ = 6656256.

The previous prime is 9998603. The next prime is 9998623. The reversal of 9998619 is 9168999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9998619 - 2⁴ = 9998603 is a prime.

It is a super-2 number, since 2×9998619² = 199944763814322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (9998689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 627 + ... + 4515.

It is an arithmetic number, because the mean of its divisors is an integer number (1668810).

Almost surely, 2^9998619 is an apocalyptic number.

9998619 is a deficient number, since it is larger than the sum of its proper divisors (3351861).

9998619 is a wasteful number, since it uses less digits than its factorization.

9998619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4749.

The product of its digits is 314928, while the sum is 51.

The square root of 9998619 is about 3162.0592973567. The cubic root of 9998619 is about 215.4335509656.

The spelling of 9998619 in words is "nine million, nine hundred ninety-eight thousand, six hundred nineteen".