3995729 has 2 divisors, whose sum is σ = 3995730. Its totient is φ = 3995728.

The previous prime is 3995713. The next prime is 3995743. The reversal of 3995729 is 9275993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3323329 + 672400 = 1823^2 + 820^2 .

It is an emirp because it is prime and its reverse (9275993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3995729 - 2⁴ = 3995713 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3995729.

It is not a weakly prime, because it can be changed into another prime (3995749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1997864 + 1997865.

It is an arithmetic number, because the mean of its divisors is an integer number (1997865).

Almost surely, 2^3995729 is an apocalyptic number.

It is an amenable number.

3995729 is a deficient number, since it is larger than the sum of its proper divisors (1).

3995729 is an equidigital number, since it uses as much as digits as its factorization.

3995729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 153090, while the sum is 44.

The square root of 3995729 is about 1998.9319648252. The cubic root of 3995729 is about 158.6835868271.

The spelling of 3995729 in words is "three million, nine hundred ninety-five thousand, seven hundred twenty-nine".