1989533 has 8 divisors (see below), whose sum is σ = 2448768. Its totient is φ = 1574064.

The previous prime is 1989517. The next prime is 1989551. The reversal of 1989533 is 3359891.

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 1989533 - 2⁴ = 1989517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989553) 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, 10841 + ... + 11022.

It is an arithmetic number, because the mean of its divisors is an integer number (306096).

2^1989533 is an apocalyptic number.

1989533 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1989533 is a deficient number, since it is larger than the sum of its proper divisors (459235).

1989533 is a wasteful number, since it uses less digits than its factorization.

1989533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21883.

The product of its digits is 29160, while the sum is 38.

The square root of 1989533 is about 1410.5080644931. The cubic root of 1989533 is about 125.7719272143.

The spelling of 1989533 in words is "one million, nine hundred eighty-nine thousand, five hundred thirty-three".