3870917 has 8 divisors (see below), whose sum is σ = 4138200. Its totient is φ = 3608064.

The previous prime is 3870913. The next prime is 3870929. The reversal of 3870917 is 7190783.

It can be written as a sum of positive squares in 4 ways, for example, as 2217121 + 1653796 = 1489^2 + 1286^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3870917 - 2² = 3870913 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 (3870913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 809 + ... + 2897.

It is an arithmetic number, because the mean of its divisors is an integer number (517275).

Almost surely, 2^3870917 is an apocalyptic number.

It is an amenable number.

3870917 is a deficient number, since it is larger than the sum of its proper divisors (267283).

3870917 is a wasteful number, since it uses less digits than its factorization.

3870917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2215.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 3870917 is about 1967.4646121341. The cubic root of 3870917 is about 157.0138465346.

The spelling of 3870917 in words is "three million, eight hundred seventy thousand, nine hundred seventeen".