3921349 has 4 divisors (see below), whose sum is σ = 3932236. Its totient is φ = 3910464.

The previous prime is 3921347. The next prime is 3921367. The reversal of 3921349 is 9431293.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9431293 = 29 ⋅325217.

It can be written as a sum of positive squares in 2 ways, for example, as 656100 + 3265249 = 810^2 + 1807^2 .

It is a cyclic number.

It is not a de Polignac number, because 3921349 - 2¹ = 3921347 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 3921349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921343) 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, 4884 + ... + 5629.

It is an arithmetic number, because the mean of its divisors is an integer number (983059).

Almost surely, 2^3921349 is an apocalyptic number.

It is an amenable number.

3921349 is a deficient number, since it is larger than the sum of its proper divisors (10887).

3921349 is a wasteful number, since it uses less digits than its factorization.

3921349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10886.

The product of its digits is 5832, while the sum is 31.

The square root of 3921349 is about 1980.2396319638. The cubic root of 3921349 is about 157.6927881924.

The spelling of 3921349 in words is "three million, nine hundred twenty-one thousand, three hundred forty-nine".