122636539 has 4 divisors (see below), whose sum is σ = 122744056. Its totient is φ = 122529024.

The previous prime is 122636533. The next prime is 122636543. The reversal of 122636539 is 935636221.

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 122636539 - 2³ = 122636531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122636498 and 122636507.

It is not an unprimeable number, because it can be changed into a prime (122636531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52029 + ... + 54334.

It is an arithmetic number, because the mean of its divisors is an integer number (30686014).

Almost surely, 2^122636539 is an apocalyptic number.

122636539 is a deficient number, since it is larger than the sum of its proper divisors (107517).

122636539 is a wasteful number, since it uses less digits than its factorization.

122636539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107516.

The product of its digits is 58320, while the sum is 37.

The square root of 122636539 is about 11074.1382960481. The cubic root of 122636539 is about 496.8286462249.

The spelling of 122636539 in words is "one hundred twenty-two million, six hundred thirty-six thousand, five hundred thirty-nine".