53129687 has 8 divisors (see below), whose sum is σ = 57569904. Its totient is φ = 48739968.

The previous prime is 53129663. The next prime is 53129717. The reversal of 53129687 is 78692135.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53129687 - 2⁶ = 53129623 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 (53129627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10418 + ... + 14655.

It is an arithmetic number, because the mean of its divisors is an integer number (7196238).

Almost surely, 2^53129687 is an apocalyptic number.

53129687 is a deficient number, since it is larger than the sum of its proper divisors (4440217).

53129687 is a wasteful number, since it uses less digits than its factorization.

53129687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25249.

The product of its digits is 90720, while the sum is 41.

The square root of 53129687 is about 7289.0113870126. The cubic root of 53129687 is about 375.9347041247.

The spelling of 53129687 in words is "fifty-three million, one hundred twenty-nine thousand, six hundred eighty-seven".