3944309 has 2 divisors, whose sum is σ = 3944310. Its totient is φ = 3944308.

The previous prime is 3944257. The next prime is 3944329. The reversal of 3944309 is 9034493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3411409 + 532900 = 1847^2 + 730^2 .

It is a cyclic number.

It is not a de Polignac number, because 3944309 - 2¹² = 3940213 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p₂₇₉₅₃₆ and since 3944309 and 279536 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3944329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1972154 + 1972155.

It is an arithmetic number, because the mean of its divisors is an integer number (1972155).

Almost surely, 2^3944309 is an apocalyptic number.

It is an amenable number.

3944309 is a deficient number, since it is larger than the sum of its proper divisors (1).

3944309 is an equidigital number, since it uses as much as digits as its factorization.

3944309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 3944309 is about 1986.0284489402. The cubic root of 3944309 is about 157.9999599423. Note that the first 4 decimals are identical.

The spelling of 3944309 in words is "three million, nine hundred forty-four thousand, three hundred nine".