53138723 has 6 divisors (see below), whose sum is σ = 58408812. Its totient is φ = 48307820.

The previous prime is 53138713. The next prime is 53138737. The reversal of 53138723 is 32783135.

53138723 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 53138723 - 2⁸ = 53138467 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53138723.

It is not an unprimeable number, because it can be changed into a prime (53138713) 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 5 ways as a sum of consecutive naturals, for example, 219461 + ... + 219702.

It is an arithmetic number, because the mean of its divisors is an integer number (9734802).

Almost surely, 2^53138723 is an apocalyptic number.

53138723 is a deficient number, since it is larger than the sum of its proper divisors (5270089).

53138723 is a wasteful number, since it uses less digits than its factorization.

53138723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439185 (or 439174 counting only the distinct ones).

The product of its digits is 15120, while the sum is 32.

The square root of 53138723 is about 7289.6311978042. The cubic root of 53138723 is about 375.9560152072.

The spelling of 53138723 in words is "fifty-three million, one hundred thirty-eight thousand, seven hundred twenty-three".