4002709 has 2 divisors, whose sum is σ = 4002710. Its totient is φ = 4002708.

The previous prime is 4002679. The next prime is 4002721. The reversal of 4002709 is 9072004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2900209 + 1102500 = 1703^2 + 1050^2 .

It is a cyclic number.

It is not a de Polignac number, because 4002709 - 2⁹ = 4002197 is a prime.

4002709 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4002709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4002109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2001354 + 2001355.

It is an arithmetic number, because the mean of its divisors is an integer number (2001355).

Almost surely, 2^4002709 is an apocalyptic number.

It is an amenable number.

4002709 is a deficient number, since it is larger than the sum of its proper divisors (1).

4002709 is an equidigital number, since it uses as much as digits as its factorization.

4002709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 4002709 is about 2000.6771353719. The cubic root of 4002709 is about 158.7759326887.

The spelling of 4002709 in words is "four million, two thousand, seven hundred nine".