3938657 has 2 divisors, whose sum is σ = 3938658. Its totient is φ = 3938656.

The previous prime is 3938653. The next prime is 3938699. The reversal of 3938657 is 7568393.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3936256 + 2401 = 1984^2 + 49^2 .

It is a cyclic number.

It is not a de Polignac number, because 3938657 - 2² = 3938653 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 3⁹ + 9⁶ + 3¹² + 8⁵ + 6⁶ + 5⁹ + 7⁷ .

It is not a weakly prime, because it can be changed into another prime (3938653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1969328 + 1969329.

It is an arithmetic number, because the mean of its divisors is an integer number (1969329).

Almost surely, 2^3938657 is an apocalyptic number.

It is an amenable number.

3938657 is a deficient number, since it is larger than the sum of its proper divisors (1).

3938657 is an equidigital number, since it uses as much as digits as its factorization.

3938657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 41.

The square root of 3938657 is about 1984.6049984821. The cubic root of 3938657 is about 157.9244551528.

The spelling of 3938657 in words is "three million, nine hundred thirty-eight thousand, six hundred fifty-seven".