61683839 has 16 divisors (see below), whose sum is σ = 71698176. Its totient is φ = 51979200.

The previous prime is 61683829. The next prime is 61683883. The reversal of 61683839 is 93838616.

It is not a de Polignac number, because 61683839 - 2¹⁶ = 61618303 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61683839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61683829) 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 15 ways as a sum of consecutive naturals, for example, 125384 + ... + 125874.

It is an arithmetic number, because the mean of its divisors is an integer number (4481136).

Almost surely, 2^61683839 is an apocalyptic number.

61683839 is a deficient number, since it is larger than the sum of its proper divisors (10014337).

61683839 is a wasteful number, since it uses less digits than its factorization.

61683839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766.

The product of its digits is 186624, while the sum is 44.

The square root of 61683839 is about 7853.9059709166. The cubic root of 61683839 is about 395.1152555832.

The spelling of 61683839 in words is "sixty-one million, six hundred eighty-three thousand, eight hundred thirty-nine".