3920949 has 6 divisors (see below), whose sum is σ = 5663606. Its totient is φ = 2613960.

The previous prime is 3920947. The next prime is 3920957. The reversal of 3920949 is 9490293.

It can be written as a sum of positive squares in only one way, i.e., 2340900 + 1580049 = 1530^2 + 1257^2 .

It is not a de Polignac number, because 3920949 - 2¹ = 3920947 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 (3920941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 217822 + ... + 217839.

Almost surely, 2^3920949 is an apocalyptic number.

It is an amenable number.

3920949 is a deficient number, since it is larger than the sum of its proper divisors (1742657).

3920949 is a wasteful number, since it uses less digits than its factorization.

3920949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435667 (or 435664 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 3920949 is about 1980.1386315104. The cubic root of 3920949 is about 157.6874261550.

The spelling of 3920949 in words is "three million, nine hundred twenty thousand, nine hundred forty-nine".