3939407 has 4 divisors (see below), whose sum is σ = 3983760. Its totient is φ = 3895056.

The previous prime is 3939379. The next prime is 3939421. The reversal of 3939407 is 7049393.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7049393 = 13 ⋅542261.

It is a cyclic number.

It is not a de Polignac number, because 3939407 - 2¹⁰ = 3938383 is a prime.

It is a super-4 number, since 4×3939407⁴ (a number of 27 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3939457) 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, 22043 + ... + 22220.

It is an arithmetic number, because the mean of its divisors is an integer number (995940).

Almost surely, 2^3939407 is an apocalyptic number.

3939407 is a deficient number, since it is larger than the sum of its proper divisors (44353).

3939407 is an equidigital number, since it uses as much as digits as its factorization.

3939407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44352.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 3939407 is about 1984.7939439650. The cubic root of 3939407 is about 157.9344785207.

The spelling of 3939407 in words is "three million, nine hundred thirty-nine thousand, four hundred seven".