61684411 has 4 divisors (see below), whose sum is σ = 61895232. Its totient is φ = 61473592.

The previous prime is 61684349. The next prime is 61684417. The reversal of 61684411 is 11448616.

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 61684411 - 2¹⁹ = 61160123 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61684417) 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, 104971 + ... + 105556.

It is an arithmetic number, because the mean of its divisors is an integer number (15473808).

Almost surely, 2^61684411 is an apocalyptic number.

61684411 is a deficient number, since it is larger than the sum of its proper divisors (210821).

61684411 is a wasteful number, since it uses less digits than its factorization.

61684411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210820.

The product of its digits is 4608, while the sum is 31.

The square root of 61684411 is about 7853.9423858340. The cubic root of 61684411 is about 395.1164768930.

The spelling of 61684411 in words is "sixty-one million, six hundred eighty-four thousand, four hundred eleven".