3920687 has 2 divisors, whose sum is σ = 3920688. Its totient is φ = 3920686.

The previous prime is 3920681. The next prime is 3920689. The reversal of 3920687 is 7860293.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3920687 - 2⁸ = 3920431 is a prime.

Together with 3920689, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₂₇₇₉₆₄ and since 3920687 and 277964 have the same sum of digits, it is a Honaker prime.

It is a zygodrome in base 6.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3920681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1960343 + 1960344.

It is an arithmetic number, because the mean of its divisors is an integer number (1960344).

Almost surely, 2^3920687 is an apocalyptic number.

3920687 is a deficient number, since it is larger than the sum of its proper divisors (1).

3920687 is an equidigital number, since it uses as much as digits as its factorization.

3920687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 3920687 is about 1980.0724734211. The cubic root of 3920687 is about 157.6839138228.

It can be divided in two parts, 39206 and 87, that added together give a palindrome (39293).

The spelling of 3920687 in words is "three million, nine hundred twenty thousand, six hundred eighty-seven".