61971841 has 4 divisors (see below), whose sum is σ = 62540500. Its totient is φ = 61403184.

The previous prime is 61971829. The next prime is 61971881. The reversal of 61971841 is 14817916.

61971841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29811600 + 32160241 = 5460^2 + 5671^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61971841 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 61971841.

It is not an unprimeable number, because it can be changed into a prime (61971881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284166 + ... + 284383.

It is an arithmetic number, because the mean of its divisors is an integer number (15635125).

Almost surely, 2^61971841 is an apocalyptic number.

It is an amenable number.

61971841 is a deficient number, since it is larger than the sum of its proper divisors (568659).

61971841 is a wasteful number, since it uses less digits than its factorization.

61971841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568658.

The product of its digits is 12096, while the sum is 37.

The square root of 61971841 is about 7872.2195726491. The cubic root of 61971841 is about 395.7292323945.

The spelling of 61971841 in words is "sixty-one million, nine hundred seventy-one thousand, eight hundred forty-one".