3928917 has 4 divisors (see below), whose sum is σ = 5238560. Its totient is φ = 2619276.

The previous prime is 3928913. The next prime is 3928931. The reversal of 3928917 is 7198293.

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 not a de Polignac number, because 3928917 - 2² = 3928913 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3928913) 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, 654817 + ... + 654822.

It is an arithmetic number, because the mean of its divisors is an integer number (1309640).

Almost surely, 2^3928917 is an apocalyptic number.

It is an amenable number.

3928917 is a deficient number, since it is larger than the sum of its proper divisors (1309643).

3928917 is a wasteful number, since it uses less digits than its factorization.

3928917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309642.

The product of its digits is 27216, while the sum is 39.

The square root of 3928917 is about 1982.1495907222. The cubic root of 3928917 is about 157.7941692985.

The spelling of 3928917 in words is "three million, nine hundred twenty-eight thousand, nine hundred seventeen".