4072309 has 2 divisors, whose sum is σ = 4072310. Its totient is φ = 4072308.

The previous prime is 4072301. The next prime is 4072337. The reversal of 4072309 is 9032704.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3694084 + 378225 = 1922^2 + 615^2 .

It is a cyclic number.

It is not a de Polignac number, because 4072309 - 2³ = 4072301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4072301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2036154 + 2036155.

It is an arithmetic number, because the mean of its divisors is an integer number (2036155).

Almost surely, 2^4072309 is an apocalyptic number.

It is an amenable number.

4072309 is a deficient number, since it is larger than the sum of its proper divisors (1).

4072309 is an equidigital number, since it uses as much as digits as its factorization.

4072309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 4072309 is about 2017.9962834455. The cubic root of 4072309 is about 159.6909267829.

The spelling of 4072309 in words is "four million, seventy-two thousand, three hundred nine".