9958539 has 4 divisors (see below), whose sum is σ = 13278056. Its totient is φ = 6639024.

The previous prime is 9958537. The next prime is 9958573. The reversal of 9958539 is 9358599.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9358599 = 3 ⋅3119533.

It is not a de Polignac number, because 9958539 - 2¹ = 9958537 is a prime.

It is a Duffinian number.

9958539 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9958537) 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, 1659754 + ... + 1659759.

It is an arithmetic number, because the mean of its divisors is an integer number (3319514).

Almost surely, 2^9958539 is an apocalyptic number.

9958539 is a deficient number, since it is larger than the sum of its proper divisors (3319517).

9958539 is a wasteful number, since it uses less digits than its factorization.

9958539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3319516.

The product of its digits is 437400, while the sum is 48.

The square root of 9958539 is about 3155.7152913405. The cubic root of 9958539 is about 215.1453064966.

The spelling of 9958539 in words is "nine million, nine hundred fifty-eight thousand, five hundred thirty-nine".