4164121729 has 4 divisors (see below), whose sum is σ = 4409070084. Its totient is φ = 3919173376.

The previous prime is 4164121721. The next prime is 4164121771. The reversal of 4164121729 is 9271214614.

4164121729 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9271214614 = 2 ⋅4635607307.

It can be written as a sum of positive squares in 2 ways, for example, as 1286872129 + 2877249600 = 35873^2 + 53640^2 .

It is a cyclic number.

It is not a de Polignac number, because 4164121729 - 2³ = 4164121721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4164121721) 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, 122474152 + ... + 122474185.

It is an arithmetic number, because the mean of its divisors is an integer number (1102267521).

Almost surely, 2^4164121729 is an apocalyptic number.

It is an amenable number.

4164121729 is a deficient number, since it is larger than the sum of its proper divisors (244948355).

4164121729 is a wasteful number, since it uses less digits than its factorization.

4164121729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244948354.

The product of its digits is 24192, while the sum is 37.

The square root of 4164121729 is about 64530.0064233687. The cubic root of 4164121729 is about 1608.8212929125.

The spelling of 4164121729 in words is "four billion, one hundred sixty-four million, one hundred twenty-one thousand, seven hundred twenty-nine".