3749309 has 2 divisors, whose sum is σ = 3749310. Its totient is φ = 3749308.

The previous prime is 3749293. The next prime is 3749311. The reversal of 3749309 is 9039473.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3694084 + 55225 = 1922^2 + 235^2 .

It is a cyclic number.

It is not a de Polignac number, because 3749309 - 2⁴ = 3749293 is a prime.

Together with 3749311, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3749329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1874654 + 1874655.

It is an arithmetic number, because the mean of its divisors is an integer number (1874655).

Almost surely, 2^3749309 is an apocalyptic number.

It is an amenable number.

3749309 is a deficient number, since it is larger than the sum of its proper divisors (1).

3749309 is an equidigital number, since it uses as much as digits as its factorization.

3749309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 3749309 is about 1936.3132494511. The cubic root of 3749309 is about 155.3520820552.

The spelling of 3749309 in words is "three million, seven hundred forty-nine thousand, three hundred nine".