4138687129 has 4 divisors (see below), whose sum is σ = 4160355840. Its totient is φ = 4117018420.

The previous prime is 4138687123. The next prime is 4138687153. The reversal of 4138687129 is 9217868314.

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 4138687129 - 2¹⁵ = 4138654361 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4138687123) 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, 10834069 + ... + 10834450.

It is an arithmetic number, because the mean of its divisors is an integer number (1040088960).

Almost surely, 2^4138687129 is an apocalyptic number.

It is an amenable number.

4138687129 is a deficient number, since it is larger than the sum of its proper divisors (21668711).

4138687129 is a wasteful number, since it uses less digits than its factorization.

4138687129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21668710.

The product of its digits is 580608, while the sum is 49.

The square root of 4138687129 is about 64332.6288052960. The cubic root of 4138687129 is about 1605.5390223140.

The spelling of 4138687129 in words is "four billion, one hundred thirty-eight million, six hundred eighty-seven thousand, one hundred twenty-nine".