3948309 has 6 divisors (see below), whose sum is σ = 5703126. Its totient is φ = 2632200.

The previous prime is 3948293. The next prime is 3948311. The reversal of 3948309 is 9038493.

It can be written as a sum of positive squares in only one way, i.e., 3132900 + 815409 = 1770^2 + 903^2 .

It is not a de Polignac number, because 3948309 - 2⁴ = 3948293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3948809) 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 in 5 ways as a sum of consecutive naturals, for example, 219342 + ... + 219359.

It is an arithmetic number, because the mean of its divisors is an integer number (950521).

Almost surely, 2^3948309 is an apocalyptic number.

It is an amenable number.

3948309 is a deficient number, since it is larger than the sum of its proper divisors (1754817).

3948309 is a wasteful number, since it uses less digits than its factorization.

3948309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438707 (or 438704 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 3948309 is about 1987.0352286761. The cubic root of 3948309 is about 158.0533521688.

The spelling of 3948309 in words is "three million, nine hundred forty-eight thousand, three hundred nine".