3986623 has 2 divisors, whose sum is σ = 3986624. Its totient is φ = 3986622.

The previous prime is 3986617. The next prime is 3986641. The reversal of 3986623 is 3266893.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3986623 - 2⁹ = 3986111 is a prime.

It is a d-powerful number, because it can be written as 3⁵ + 9⁴ + 8⁷ + 6³ + 6⁷ + 2¹³ + 3¹³ .

3986623 is a lucky number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3986663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1993311 + 1993312.

It is an arithmetic number, because the mean of its divisors is an integer number (1993312).

Almost surely, 2^3986623 is an apocalyptic number.

3986623 is a deficient number, since it is larger than the sum of its proper divisors (1).

3986623 is an equidigital number, since it uses as much as digits as its factorization.

3986623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 37.

The square root of 3986623 is about 1996.6529493129. The cubic root of 3986623 is about 158.5629520361.

It can be divided in two parts, 398 and 6623, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 3986623 in words is "three million, nine hundred eighty-six thousand, six hundred twenty-three".