61841839 has 4 divisors (see below), whose sum is σ = 61858224. Its totient is φ = 61825456.

The previous prime is 61841803. The next prime is 61841867. The reversal of 61841839 is 93814816.

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 61841839 - 2⁹ = 61841327 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 (61841939) 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, 654 + ... + 11140.

It is an arithmetic number, because the mean of its divisors is an integer number (15464556).

Almost surely, 2^61841839 is an apocalyptic number.

61841839 is a deficient number, since it is larger than the sum of its proper divisors (16385).

61841839 is a wasteful number, since it uses less digits than its factorization.

61841839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16384.

The product of its digits is 41472, while the sum is 40.

The square root of 61841839 is about 7863.9582272543. The cubic root of 61841839 is about 395.4523237948.

The spelling of 61841839 in words is "sixty-one million, eight hundred forty-one thousand, eight hundred thirty-nine".