53129957 has 4 divisors (see below), whose sum is σ = 53221056. Its totient is φ = 53038860.

The previous prime is 53129953. The next prime is 53129959. The reversal of 53129957 is 75992135.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53129957 - 2² = 53129953 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 (53129953) 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, 44669 + ... + 45842.

It is an arithmetic number, because the mean of its divisors is an integer number (13305264).

Almost surely, 2^53129957 is an apocalyptic number.

It is an amenable number.

53129957 is a deficient number, since it is larger than the sum of its proper divisors (91099).

53129957 is an equidigital number, since it uses as much as digits as its factorization.

53129957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91098.

The product of its digits is 85050, while the sum is 41.

The square root of 53129957 is about 7289.0299080193. The cubic root of 53129957 is about 375.9353409450.

The spelling of 53129957 in words is "fifty-three million, one hundred twenty-nine thousand, nine hundred fifty-seven".