3856987 has 2 divisors, whose sum is σ = 3856988. Its totient is φ = 3856986.

The previous prime is 3856973. The next prime is 3856997. The reversal of 3856987 is 7896583.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3856987 is a prime.

It is a super-3 number, since 3×3856987³ (a number of 21 digits) contains 333 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (3856907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1928493 + 1928494.

It is an arithmetic number, because the mean of its divisors is an integer number (1928494).

Almost surely, 2^3856987 is an apocalyptic number.

3856987 is a deficient number, since it is larger than the sum of its proper divisors (1).

3856987 is an equidigital number, since it uses as much as digits as its factorization.

3856987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 46.

The square root of 3856987 is about 1963.9213324367. The cubic root of 3856987 is about 156.8252752146.

The spelling of 3856987 in words is "three million, eight hundred fifty-six thousand, nine hundred eighty-seven".