3866623 has 2 divisors, whose sum is σ = 3866624. Its totient is φ = 3866622.

The previous prime is 3866617. The next prime is 3866627. The reversal of 3866623 is 3266683.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3866623 - 2¹³ = 3858431 is a prime.

It is an Ulam number.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3866627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1933311 + 1933312.

It is an arithmetic number, because the mean of its divisors is an integer number (1933312).

Almost surely, 2^3866623 is an apocalyptic number.

3866623 is a deficient number, since it is larger than the sum of its proper divisors (1).

3866623 is an equidigital number, since it uses as much as digits as its factorization.

3866623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 34.

The square root of 3866623 is about 1966.3730571791. The cubic root of 3866623 is about 156.9557666779.

It can be divided in two parts, 3866 and 623, that added together give a square (4489 = 67²).

The spelling of 3866623 in words is "three million, eight hundred sixty-six thousand, six hundred twenty-three".