83505539 has 4 divisors (see below), whose sum is σ = 89929056. Its totient is φ = 77082024.

The previous prime is 83505509. The next prime is 83505563. The reversal of 83505539 is 93550538.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93550538 = 2 ⋅46775269.

It is a cyclic number.

It is not a de Polignac number, because 83505539 - 2¹² = 83501443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83505509) 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, 3211739 + ... + 3211764.

It is an arithmetic number, because the mean of its divisors is an integer number (22482264).

Almost surely, 2^83505539 is an apocalyptic number.

83505539 is a deficient number, since it is larger than the sum of its proper divisors (6423517).

83505539 is a wasteful number, since it uses less digits than its factorization.

83505539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6423516.

The product of its (nonzero) digits is 81000, while the sum is 38.

The square root of 83505539 is about 9138.1365168179. The cubic root of 83505539 is about 437.0908963716.

The spelling of 83505539 in words is "eighty-three million, five hundred five thousand, five hundred thirty-nine".