1319998 has 4 divisors (see below), whose sum is σ = 1980000. Its totient is φ = 659998.

The previous prime is 1319963. The next prime is 1320019. The reversal of 1319998 is 8999131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8999131 = 41 ⋅219491.

It is a self number, because there is not a number n which added to its sum of digits gives 1319998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329998 + ... + 330001.

It is an arithmetic number, because the mean of its divisors is an integer number (495000).

2^1319998 is an apocalyptic number.

1319998 is a deficient number, since it is larger than the sum of its proper divisors (660002).

1319998 is an equidigital number, since it uses as much as digits as its factorization.

1319998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660001.

The product of its digits is 17496, while the sum is 40.

The square root of 1319998 is about 1148.9116589190. The cubic root of 1319998 is about 109.6960756465.

The spelling of 1319998 in words is "one million, three hundred nineteen thousand, nine hundred ninety-eight".