3921797 has 8 divisors (see below), whose sum is σ = 4333440. Its totient is φ = 3519360.

The previous prime is 3921791. The next prime is 3921817. The reversal of 3921797 is 7971293.

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 3921797 - 2¹⁴ = 3905413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3921797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921791) 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, 1388 + ... + 3125.

It is an arithmetic number, because the mean of its divisors is an integer number (541680).

Almost surely, 2^3921797 is an apocalyptic number.

It is an amenable number.

3921797 is a deficient number, since it is larger than the sum of its proper divisors (411643).

3921797 is a wasteful number, since it uses less digits than its factorization.

3921797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4603.

The product of its digits is 23814, while the sum is 38.

The square root of 3921797 is about 1980.3527463561. The cubic root of 3921797 is about 157.6987932414.

Subtracting from 3921797 its product of digits (23814), we obtain a palindrome (3897983).

The spelling of 3921797 in words is "three million, nine hundred twenty-one thousand, seven hundred ninety-seven".