3906557 has 2 divisors, whose sum is σ = 3906558. Its totient is φ = 3906556.

The previous prime is 3906547. The next prime is 3906559. The reversal of 3906557 is 7556093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1999396 + 1907161 = 1414^2 + 1381^2 .

It is an emirp because it is prime and its reverse (7556093) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3906557 - 2⁴ = 3906541 is a prime.

It is a super-2 number, since 2×3906557² = 30522375188498, which contains 22 as substring.

Together with 3906559, it forms a pair of twin primes.

It is a Chen prime.

It is a d-powerful number, because it can be written as 3⁵ + 9 + 0 + 6 + 5⁹ + 5⁹ + 7² .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3906559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1953278 + 1953279.

It is an arithmetic number, because the mean of its divisors is an integer number (1953279).

Almost surely, 2^3906557 is an apocalyptic number.

It is an amenable number.

3906557 is a deficient number, since it is larger than the sum of its proper divisors (1).

3906557 is an equidigital number, since it uses as much as digits as its factorization.

3906557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28350, while the sum is 35.

The square root of 3906557 is about 1976.5012016187. The cubic root of 3906557 is about 157.4942569502.

The spelling of 3906557 in words is "three million, nine hundred six thousand, five hundred fifty-seven".