9992539 has 4 divisors (see below), whose sum is σ = 10006024. Its totient is φ = 9979056.

The previous prime is 9992533. The next prime is 9992569. The reversal of 9992539 is 9352999.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9352999 = 67 ⋅139597.

It is a cyclic number.

It is not a de Polignac number, because 9992539 - 2³ = 9992531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9992531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5562 + ... + 7135.

It is an arithmetic number, because the mean of its divisors is an integer number (2501506).

Almost surely, 2^9992539 is an apocalyptic number.

9992539 is a deficient number, since it is larger than the sum of its proper divisors (13485).

9992539 is a wasteful number, since it uses less digits than its factorization.

9992539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13484.

The product of its digits is 196830, while the sum is 46.

The square root of 9992539 is about 3161.0977523639. The cubic root of 9992539 is about 215.3898748814.

The spelling of 9992539 in words is "nine million, nine hundred ninety-two thousand, five hundred thirty-nine".