53185123129 has 2 divisors, whose sum is σ = 53185123130. Its totient is φ = 53185123128.

The previous prime is 53185123109. The next prime is 53185123193. The reversal of 53185123129 is 92132158135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41079182400 + 12105940729 = 202680^2 + 110027^2 .

It is a cyclic number.

It is not a de Polignac number, because 53185123129 - 2²³ = 53176734521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53185123091 and 53185123100.

It is not a weakly prime, because it can be changed into another prime (53185123109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26592561564 + 26592561565.

It is an arithmetic number, because the mean of its divisors is an integer number (26592561565).

Almost surely, 2^53185123129 is an apocalyptic number.

It is an amenable number.

53185123129 is a deficient number, since it is larger than the sum of its proper divisors (1).

53185123129 is an equidigital number, since it uses as much as digits as its factorization.

53185123129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 40.

The spelling of 53185123129 in words is "fifty-three billion, one hundred eighty-five million, one hundred twenty-three thousand, one hundred twenty-nine".