3870817 has 4 divisors (see below), whose sum is σ = 3960880. Its totient is φ = 3780756.

The previous prime is 3870803. The next prime is 3870821. The reversal of 3870817 is 7180783.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3870817 - 2⁷ = 3870689 is a prime.

It is a Duffinian number.

3870817 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3870827) 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, 44967 + ... + 45052.

It is an arithmetic number, because the mean of its divisors is an integer number (990220).

Almost surely, 2^3870817 is an apocalyptic number.

It is an amenable number.

3870817 is a deficient number, since it is larger than the sum of its proper divisors (90063).

3870817 is an equidigital number, since it uses as much as digits as its factorization.

3870817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90062.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 3870817 is about 1967.4391985523. The cubic root of 3870817 is about 157.0124944416.

Subtracting from 3870817 its sum of digits (34), we obtain a palindrome (3870783).

The spelling of 3870817 in words is "three million, eight hundred seventy thousand, eight hundred seventeen".