53781047 has 4 divisors (see below), whose sum is σ = 56944656. Its totient is φ = 50617440.

The previous prime is 53781043. The next prime is 53781059. The reversal of 53781047 is 74018735.

53781047 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 is a cyclic number.

It is not a de Polignac number, because 53781047 - 2² = 53781043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53780998 and 53781016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53781041) 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, 1581779 + ... + 1581812.

It is an arithmetic number, because the mean of its divisors is an integer number (14236164).

Almost surely, 2^53781047 is an apocalyptic number.

53781047 is a deficient number, since it is larger than the sum of its proper divisors (3163609).

53781047 is a wasteful number, since it uses less digits than its factorization.

53781047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3163608.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 53781047 is about 7333.5562314610. The cubic root of 53781047 is about 377.4647646308.

The spelling of 53781047 in words is "fifty-three million, seven hundred eighty-one thousand, forty-seven".