5185123729 has 2 divisors, whose sum is σ = 5185123730. Its totient is φ = 5185123728.

The previous prime is 5185123711. The next prime is 5185123751. The reversal of 5185123729 is 9273215815.

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., 3712099329 + 1473024400 = 60927^2 + 38380^2 .

It is a cyclic number.

It is not a de Polignac number, because 5185123729 - 2⁹ = 5185123217 is a prime.

It is not a weakly prime, because it can be changed into another prime (5185123799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2592561864 + 2592561865.

It is an arithmetic number, because the mean of its divisors is an integer number (2592561865).

Almost surely, 2^5185123729 is an apocalyptic number.

It is an amenable number.

5185123729 is a deficient number, since it is larger than the sum of its proper divisors (1).

5185123729 is an equidigital number, since it uses as much as digits as its factorization.

5185123729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 43.

The square root of 5185123729 is about 72007.8032507589. The cubic root of 5185123729 is about 1730.8245291664.

The spelling of 5185123729 in words is "five billion, one hundred eighty-five million, one hundred twenty-three thousand, seven hundred twenty-nine".