1993609 has 8 divisors (see below), whose sum is σ = 2071872. Its totient is φ = 1916880.

The previous prime is 1993603. The next prime is 1993627. The reversal of 1993609 is 9063991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1993609 - 2³ = 1993601 is a prime.

It is an Ulam number.

It is a Duffinian number.

1993609 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1993601) 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, 2727 + ... + 3379.

It is an arithmetic number, because the mean of its divisors is an integer number (258984).

2^1993609 is an apocalyptic number.

It is an amenable number.

1993609 is a deficient number, since it is larger than the sum of its proper divisors (78263).

1993609 is an equidigital number, since it uses as much as digits as its factorization.

1993609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767.

The product of its (nonzero) digits is 13122, while the sum is 37.

The square root of 1993609 is about 1411.9521946582. The cubic root of 1993609 is about 125.8577591965.

The spelling of 1993609 in words is "one million, nine hundred ninety-three thousand, six hundred nine".