61841847 has 4 divisors (see below), whose sum is σ = 82455800. Its totient is φ = 41227896.

The previous prime is 61841803. The next prime is 61841867. The reversal of 61841847 is 74814816.

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

It is not a de Polignac number, because 61841847 - 2¹⁶ = 61776311 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 (61841867) 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, 10306972 + ... + 10306977.

It is an arithmetic number, because the mean of its divisors is an integer number (20613950).

Almost surely, 2^61841847 is an apocalyptic number.

61841847 is a deficient number, since it is larger than the sum of its proper divisors (20613953).

61841847 is a wasteful number, since it uses less digits than its factorization.

61841847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20613952.

The product of its digits is 43008, while the sum is 39.

The square root of 61841847 is about 7863.9587359039. The cubic root of 61841847 is about 395.4523408470.

The spelling of 61841847 in words is "sixty-one million, eight hundred forty-one thousand, eight hundred forty-seven".