3957389 has 2 divisors, whose sum is σ = 3957390. Its totient is φ = 3957388.

The previous prime is 3957383. The next prime is 3957397. The reversal of 3957389 is 9837593.

3957389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3736489 + 220900 = 1933^2 + 470^2 .

It is a cyclic number.

It is not a de Polignac number, because 3957389 - 2⁸ = 3957133 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3957383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1978694 + 1978695.

It is an arithmetic number, because the mean of its divisors is an integer number (1978695).

Almost surely, 2^3957389 is an apocalyptic number.

It is an amenable number.

3957389 is a deficient number, since it is larger than the sum of its proper divisors (1).

3957389 is an equidigital number, since it uses as much as digits as its factorization.

3957389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 44.

The square root of 3957389 is about 1989.3187276050. The cubic root of 3957389 is about 158.1744188258.

The spelling of 3957389 in words is "three million, nine hundred fifty-seven thousand, three hundred eighty-nine".