989712533 has 4 divisors (see below), whose sum is σ = 989897760. Its totient is φ = 989527308.

The previous prime is 989712491. The next prime is 989712547. The reversal of 989712533 is 335217989.

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, and also an emirpimes, since its reverse is a distinct semiprime: 335217989 = 29 ⋅11559241.

It is a cyclic number.

It is not a de Polignac number, because 989712533 - 2¹⁰ = 989711509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989712583) 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, 84353 + ... + 95366.

It is an arithmetic number, because the mean of its divisors is an integer number (247474440).

Almost surely, 2^989712533 is an apocalyptic number.

It is an amenable number.

989712533 is a deficient number, since it is larger than the sum of its proper divisors (185227).

989712533 is a wasteful number, since it uses less digits than its factorization.

989712533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185226.

The product of its digits is 408240, while the sum is 47.

The square root of 989712533 is about 31459.6969629397. The cubic root of 989712533 is about 996.5590175540.

The spelling of 989712533 in words is "nine hundred eighty-nine million, seven hundred twelve thousand, five hundred thirty-three".