3856613 has 2 divisors, whose sum is σ = 3856614. Its totient is φ = 3856612.

The previous prime is 3856607. The next prime is 3856631. The reversal of 3856613 is 3166583.

Together with next prime (3856631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2411809 + 1444804 = 1553^2 + 1202^2 .

It is a cyclic number.

It is not a de Polignac number, because 3856613 - 2⁴ = 3856597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3856613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3856213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1928306 + 1928307.

It is an arithmetic number, because the mean of its divisors is an integer number (1928307).

Almost surely, 2^3856613 is an apocalyptic number.

It is an amenable number.

3856613 is a deficient number, since it is larger than the sum of its proper divisors (1).

3856613 is an equidigital number, since it uses as much as digits as its factorization.

3856613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 32.

The square root of 3856613 is about 1963.8261124652. The cubic root of 3856613 is about 156.8202060981.

The spelling of 3856613 in words is "three million, eight hundred fifty-six thousand, six hundred thirteen".