7989543 has 8 divisors (see below), whose sum is σ = 11836400. Its totient is φ = 5326344.

The previous prime is 7989523. The next prime is 7989563. The reversal of 7989543 is 3459897.

It is an interprime number because it is at equal distance from previous prime (7989523) and next prime (7989563).

It is not a de Polignac number, because 7989543 - 2¹⁴ = 7973159 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 (7989523) 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, 147928 + ... + 147981.

It is an arithmetic number, because the mean of its divisors is an integer number (1479550).

Almost surely, 2^7989543 is an apocalyptic number.

7989543 is a deficient number, since it is larger than the sum of its proper divisors (3846857).

7989543 is a wasteful number, since it uses less digits than its factorization.

7989543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295918 (or 295912 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 7989543 is about 2826.5779663756. The cubic root of 7989543 is about 199.9128203374.

The spelling of 7989543 in words is "seven million, nine hundred eighty-nine thousand, five hundred forty-three".