3939157 has 8 divisors (see below), whose sum is σ = 4175640. Its totient is φ = 3709440.

The previous prime is 3939149. The next prime is 3939181. The reversal of 3939157 is 7519393.

It can be written as a sum of positive squares in 4 ways, for example, as 531441 + 3407716 = 729^2 + 1846^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3939157 - 2³ = 3939149 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 (3939457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 468 + ... + 2845.

It is an arithmetic number, because the mean of its divisors is an integer number (521955).

Almost surely, 2^3939157 is an apocalyptic number.

It is an amenable number.

3939157 is a deficient number, since it is larger than the sum of its proper divisors (236483).

3939157 is a wasteful number, since it uses less digits than its factorization.

3939157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3383.

The product of its digits is 25515, while the sum is 37.

The square root of 3939157 is about 1984.7309641359. The cubic root of 3939157 is about 157.9311375394.

It can be divided in two parts, 3939 and 157, that added together give a 12-th power (4096 = 2¹²).

The spelling of 3939157 in words is "three million, nine hundred thirty-nine thousand, one hundred fifty-seven".