4091729 has 2 divisors, whose sum is σ = 4091730. Its totient is φ = 4091728.

The previous prime is 4091693. The next prime is 4091741. The reversal of 4091729 is 9271904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3794704 + 297025 = 1948^2 + 545^2 .

It is a cyclic number.

It is not a de Polignac number, because 4091729 - 2¹⁶ = 4026193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4091695 and 4091704.

It is not a weakly prime, because it can be changed into another prime (4091749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2045864 + 2045865.

It is an arithmetic number, because the mean of its divisors is an integer number (2045865).

Almost surely, 2^4091729 is an apocalyptic number.

It is an amenable number.

4091729 is a deficient number, since it is larger than the sum of its proper divisors (1).

4091729 is an equidigital number, since it uses as much as digits as its factorization.

4091729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 4091729 is about 2022.8022641870. The cubic root of 4091729 is about 159.9443686803.

The spelling of 4091729 in words is "four million, ninety-one thousand, seven hundred twenty-nine".