1593661 has 4 divisors (see below), whose sum is σ = 1597024. Its totient is φ = 1590300.

The previous prime is 1593659. The next prime is 1593703. The reversal of 1593661 is 1663951.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1593661 - 2¹ = 1593659 is a prime.

It is a Duffinian number.

1593661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1593061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 825 + ... + 1966.

It is an arithmetic number, because the mean of its divisors is an integer number (399256).

2^1593661 is an apocalyptic number.

It is an amenable number.

1593661 is a deficient number, since it is larger than the sum of its proper divisors (3363).

1593661 is an equidigital number, since it uses as much as digits as its factorization.

1593661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3362.

The product of its digits is 4860, while the sum is 31.

The square root of 1593661 is about 1262.4028675506. The cubic root of 1593661 is about 116.8060438560.

The spelling of 1593661 in words is "one million, five hundred ninety-three thousand, six hundred sixty-one".