2068538729 has 4 divisors (see below), whose sum is σ = 2070723984. Its totient is φ = 2066353476.

The previous prime is 2068538723. The next prime is 2068538777. The reversal of 2068538729 is 9278358602.

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 2068538729 - 2⁸ = 2068538473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2068538723) 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, 1091207 + ... + 1093100.

It is an arithmetic number, because the mean of its divisors is an integer number (517680996).

Almost surely, 2^2068538729 is an apocalyptic number.

It is an amenable number.

2068538729 is a deficient number, since it is larger than the sum of its proper divisors (2185255).

2068538729 is an equidigital number, since it uses as much as digits as its factorization.

2068538729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2185254.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 2068538729 is about 45481.1909364739. The cubic root of 2068538729 is about 1274.1519371789.

The spelling of 2068538729 in words is "two billion, sixty-eight million, five hundred thirty-eight thousand, seven hundred twenty-nine".