3949807 has 4 divisors (see below), whose sum is σ = 3989016. Its totient is φ = 3910600.

The previous prime is 3949793. The next prime is 3949819. The reversal of 3949807 is 7089493.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3949807 - 2¹¹ = 3947759 is a prime.

It is an Ulam number.

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 3949807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3949867) 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 3 ways as a sum of consecutive naturals, for example, 19453 + ... + 19654.

It is an arithmetic number, because the mean of its divisors is an integer number (997254).

Almost surely, 2^3949807 is an apocalyptic number.

3949807 is a deficient number, since it is larger than the sum of its proper divisors (39209).

3949807 is a wasteful number, since it uses less digits than its factorization.

3949807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39208.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 3949807 is about 1987.4121364226. The cubic root of 3949807 is about 158.0733382764.

It can be divided in two parts, 394 and 9807, that added together give a palindrome (10201).

The spelling of 3949807 in words is "three million, nine hundred forty-nine thousand, eight hundred seven".