1573989 has 8 divisors (see below), whose sum is σ = 2106720. Its totient is φ = 1045296.

The previous prime is 1573973. The next prime is 1573997. The reversal of 1573989 is 9893751.

It is a happy number.

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

It is not a de Polignac number, because 1573989 - 2⁴ = 1573973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1573989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1573909) 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 7 ways as a sum of consecutive naturals, for example, 67 + ... + 1775.

It is an arithmetic number, because the mean of its divisors is an integer number (263340).

2^1573989 is an apocalyptic number.

It is an amenable number.

1573989 is a deficient number, since it is larger than the sum of its proper divisors (532731).

1573989 is a wasteful number, since it uses less digits than its factorization.

1573989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2019.

The product of its digits is 68040, while the sum is 42.

The square root of 1573989 is about 1254.5871831005. The cubic root of 1573989 is about 116.3234383931.

The spelling of 1573989 in words is "one million, five hundred seventy-three thousand, nine hundred eighty-nine".