61335839 has 4 divisors (see below), whose sum is σ = 61417200. Its totient is φ = 61254480.

The previous prime is 61335821. The next prime is 61335889. The reversal of 61335839 is 93853316.

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 61335839 - 2¹⁶ = 61270303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61335889) 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, 39539 + ... + 41060.

It is an arithmetic number, because the mean of its divisors is an integer number (15354300).

Almost surely, 2^61335839 is an apocalyptic number.

61335839 is a deficient number, since it is larger than the sum of its proper divisors (81361).

61335839 is an equidigital number, since it uses as much as digits as its factorization.

61335839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81360.

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

The square root of 61335839 is about 7831.7200537302. The cubic root of 61335839 is about 394.3708169451.

The spelling of 61335839 in words is "sixty-one million, three hundred thirty-five thousand, eight hundred thirty-nine".