3909071 has 4 divisors (see below), whose sum is σ = 3929112. Its totient is φ = 3889032.

The previous prime is 3909049. The next prime is 3909083. The reversal of 3909071 is 1709093.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3909071 - 2¹⁸ = 3646927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3909091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9725 + ... + 10118.

It is an arithmetic number, because the mean of its divisors is an integer number (982278).

Almost surely, 2^3909071 is an apocalyptic number.

3909071 is a deficient number, since it is larger than the sum of its proper divisors (20041).

3909071 is a wasteful number, since it uses less digits than its factorization.

3909071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20040.

The product of its (nonzero) digits is 1701, while the sum is 29.

The square root of 3909071 is about 1977.1370716265. The cubic root of 3909071 is about 157.5280339785.

The spelling of 3909071 in words is "three million, nine hundred nine thousand, seventy-one".