5185489129 has 2 divisors, whose sum is σ = 5185489130. Its totient is φ = 5185489128.

The previous prime is 5185489117. The next prime is 5185489151. The reversal of 5185489129 is 9219845815.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5091107904 + 94381225 = 71352^2 + 9715^2 .

It is a cyclic number.

It is not a de Polignac number, because 5185489129 - 2²¹ = 5183391977 is a prime.

It is not a weakly prime, because it can be changed into another prime (5185489109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2592744564 + 2592744565.

It is an arithmetic number, because the mean of its divisors is an integer number (2592744565).

Almost surely, 2^5185489129 is an apocalyptic number.

It is an amenable number.

5185489129 is a deficient number, since it is larger than the sum of its proper divisors (1).

5185489129 is an equidigital number, since it uses as much as digits as its factorization.

5185489129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1036800, while the sum is 52.

The square root of 5185489129 is about 72010.3404310798. The cubic root of 5185489129 is about 1730.8651857615.

The spelling of 5185489129 in words is "five billion, one hundred eighty-five million, four hundred eighty-nine thousand, one hundred twenty-nine".