1998927 has 12 divisors (see below), whose sum is σ = 3299920. Its totient is φ = 1142208.

The previous prime is 1998923. The next prime is 1998943. The reversal of 1998927 is 7298991.

It is not a de Polignac number, because 1998927 - 2² = 1998923 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15802 + ... + 15927.

2^1998927 is an apocalyptic number.

1998927 is a deficient number, since it is larger than the sum of its proper divisors (1300993).

1998927 is a wasteful number, since it uses less digits than its factorization.

1998927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31742 (or 31739 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 1998927 is about 1413.8341486893. The cubic root of 1998927 is about 125.9695693708.

The spelling of 1998927 in words is "one million, nine hundred ninety-eight thousand, nine hundred twenty-seven".