83136539 has 4 divisors (see below), whose sum is σ = 83913624. Its totient is φ = 82359456.

The previous prime is 83136517. The next prime is 83136551. The reversal of 83136539 is 93563138.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 83136539 - 2¹² = 83132443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83136509) 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, 388382 + ... + 388595.

It is an arithmetic number, because the mean of its divisors is an integer number (20978406).

Almost surely, 2^83136539 is an apocalyptic number.

83136539 is a deficient number, since it is larger than the sum of its proper divisors (777085).

83136539 is a wasteful number, since it uses less digits than its factorization.

83136539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777084.

The product of its digits is 58320, while the sum is 38.

The square root of 83136539 is about 9117.9240510107. The cubic root of 83136539 is about 436.4461299859.

The spelling of 83136539 in words is "eighty-three million, one hundred thirty-six thousand, five hundred thirty-nine".