1611998 has 16 divisors (see below), whose sum is σ = 2592000. Its totient is φ = 749592.

The previous prime is 1611971. The next prime is 1612007. The reversal of 1611998 is 8991161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1883 + ... + 2601.

It is an arithmetic number, because the mean of its divisors is an integer number (162000).

2^1611998 is an apocalyptic number.

1611998 is a deficient number, since it is larger than the sum of its proper divisors (980002).

1611998 is a wasteful number, since it uses less digits than its factorization.

1611998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799.

The product of its digits is 3888, while the sum is 35.

The square root of 1611998 is about 1269.6448322267. The cubic root of 1611998 is about 117.2523348371.

The spelling of 1611998 in words is "one million, six hundred eleven thousand, nine hundred ninety-eight".