53781039 has 36 divisors (see below), whose sum is σ = 88593960. Its totient is φ = 31337280.

The previous prime is 53781011. The next prime is 53781041. The reversal of 53781039 is 93018735.

53781039 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53781039 - 2⁹ = 53780527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53780994 and 53781012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53781059) 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 35 ways as a sum of consecutive naturals, for example, 27969 + ... + 29829.

Almost surely, 2^53781039 is an apocalyptic number.

53781039 is a deficient number, since it is larger than the sum of its proper divisors (34812921).

53781039 is a wasteful number, since it uses less digits than its factorization.

53781039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912 (or 1896 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 53781039 is about 7333.5556860230. Note that the first 3 decimals coincide. The cubic root of 53781039 is about 377.4647459147.

Subtracting 53781039 from its reverse (93018735), we obtain a square (39237696 = 6264²).

The spelling of 53781039 in words is "fifty-three million, seven hundred eighty-one thousand, thirty-nine".