53387129 has 2 divisors, whose sum is σ = 53387130. Its totient is φ = 53387128.

The previous prime is 53387099. The next prime is 53387143. The reversal of 53387129 is 92178335.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45697600 + 7689529 = 6760^2 + 2773^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53387129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53387092 and 53387101.

It is not a weakly prime, because it can be changed into another prime (53381129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26693564 + 26693565.

It is an arithmetic number, because the mean of its divisors is an integer number (26693565).

Almost surely, 2^53387129 is an apocalyptic number.

It is an amenable number.

53387129 is a deficient number, since it is larger than the sum of its proper divisors (1).

53387129 is an equidigital number, since it uses as much as digits as its factorization.

53387129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The square root of 53387129 is about 7306.6496426201. The cubic root of 53387129 is about 376.5409281755.

The spelling of 53387129 in words is "fifty-three million, three hundred eighty-seven thousand, one hundred twenty-nine".