53129789 has 4 divisors (see below), whose sum is σ = 53245500. Its totient is φ = 53014080.

The previous prime is 53129773. The next prime is 53129807. The reversal of 53129789 is 98792135.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15405625 + 37724164 = 3925^2 + 6142^2 .

It is a cyclic number.

It is not a de Polignac number, because 53129789 - 2⁴ = 53129773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53129759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57164 + ... + 58085.

It is an arithmetic number, because the mean of its divisors is an integer number (13311375).

Almost surely, 2^53129789 is an apocalyptic number.

It is an amenable number.

53129789 is a deficient number, since it is larger than the sum of its proper divisors (115711).

53129789 is a wasteful number, since it uses less digits than its factorization.

53129789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115710.

The product of its digits is 136080, while the sum is 44.

The square root of 53129789 is about 7289.0183838429. The cubic root of 53129789 is about 375.9349447015.

The spelling of 53129789 in words is "fifty-three million, one hundred twenty-nine thousand, seven hundred eighty-nine".