3957137 has 4 divisors (see below), whose sum is σ = 4093620. Its totient is φ = 3820656.

The previous prime is 3957133. The next prime is 3957143. The reversal of 3957137 is 7317593.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3066001 + 891136 = 1751^2 + 944^2 .

It is a cyclic number.

It is not a de Polignac number, because 3957137 - 2² = 3957133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3957097 and 3957106.

It is not an unprimeable number, because it can be changed into a prime (3957133) 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, 68198 + ... + 68255.

It is an arithmetic number, because the mean of its divisors is an integer number (1023405).

Almost surely, 2^3957137 is an apocalyptic number.

It is an amenable number.

3957137 is a deficient number, since it is larger than the sum of its proper divisors (136483).

3957137 is a wasteful number, since it uses less digits than its factorization.

3957137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136482.

The product of its digits is 19845, while the sum is 35.

The square root of 3957137 is about 1989.2553883300. The cubic root of 3957137 is about 158.1710613259.

The spelling of 3957137 in words is "three million, nine hundred fifty-seven thousand, one hundred thirty-seven".