3906559 has 2 divisors, whose sum is σ = 3906560. Its totient is φ = 3906558.

The previous prime is 3906557. The next prime is 3906563. The reversal of 3906559 is 9556093.

It is a weak prime.

It is an emirp because it is prime and its reverse (9556093) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3906559 - 2¹ = 3906557 is a prime.

It is a super-2 number, since 2×3906559² = 30522406440962, which contains 22 as substring.

Together with 3906557, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 3 + 9 + 0 + 6³ + 5⁹ + 5⁹ + 9² .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3906557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1953279 + 1953280.

It is an arithmetic number, because the mean of its divisors is an integer number (1953280).

Almost surely, 2^3906559 is an apocalyptic number.

3906559 is a deficient number, since it is larger than the sum of its proper divisors (1).

3906559 is an equidigital number, since it uses as much as digits as its factorization.

3906559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36450, while the sum is 37.

The square root of 3906559 is about 1976.5017075631. The cubic root of 3906559 is about 157.4942838271.

It can be divided in two parts, 3906 and 559, that added together give a triangular number (4465 = T₉₄).

The spelling of 3906559 in words is "three million, nine hundred six thousand, five hundred fifty-nine".