1398919 has 4 divisors (see below), whose sum is σ = 1431496. Its totient is φ = 1366344.

The previous prime is 1398911. The next prime is 1398967. The reversal of 1398919 is 9198931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9198931 = 7 ⋅1314133.

It is a cyclic number.

It is not a de Polignac number, because 1398919 - 2³ = 1398911 is a prime.

It is a super-2 number, since 2×1398919² = 3913948737122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16224 + ... + 16309.

It is an arithmetic number, because the mean of its divisors is an integer number (357874).

2^1398919 is an apocalyptic number.

1398919 is a deficient number, since it is larger than the sum of its proper divisors (32577).

1398919 is an equidigital number, since it uses as much as digits as its factorization.

1398919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32576.

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

The square root of 1398919 is about 1182.7590625313. The cubic root of 1398919 is about 111.8400938717.

The spelling of 1398919 in words is "one million, three hundred ninety-eight thousand, nine hundred nineteen".