1609993 has 24 divisors (see below), whose sum is σ = 2134080. Its totient is φ = 1199520.

The previous prime is 1609991. The next prime is 1609997. The reversal of 1609993 is 3999061.

It is not a de Polignac number, because 1609993 - 2¹ = 1609991 is a prime.

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 (1609991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15580 + ... + 15682.

It is an arithmetic number, because the mean of its divisors is an integer number (88920).

2^1609993 is an apocalyptic number.

It is an amenable number.

1609993 is a deficient number, since it is larger than the sum of its proper divisors (524087).

1609993 is a wasteful number, since it uses less digits than its factorization.

1609993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 150 counting only the distinct ones).

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

The square root of 1609993 is about 1268.8549956555. The cubic root of 1609993 is about 117.2037019258.

It can be divided in two parts, 160 and 9993, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 1609993 in words is "one million, six hundred nine thousand, nine hundred ninety-three".