1609998 has 16 divisors (see below), whose sum is σ = 3467856. Its totient is φ = 495360.

The previous prime is 1609997. The next prime is 1609999. The reversal of 1609998 is 8999061.

It is an interprime number because it is at equal distance from previous prime (1609997) and next prime (1609999).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1609991) 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, 10243 + ... + 10398.

It is an arithmetic number, because the mean of its divisors is an integer number (216741).

2^1609998 is an apocalyptic number.

1609998 is an abundant number, since it is smaller than the sum of its proper divisors (1857858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1609998 is a wasteful number, since it uses less digits than its factorization.

1609998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20659.

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 1609998 is about 1268.8569659343. The cubic root of 1609998 is about 117.2038232551.

The spelling of 1609998 in words is "one million, six hundred nine thousand, nine hundred ninety-eight".