4013623 has 2 divisors, whose sum is σ = 4013624. Its totient is φ = 4013622.

The previous prime is 4013621. The next prime is 4013641. The reversal of 4013623 is 3263104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4013623 - 2¹ = 4013621 is a prime.

It is a super-2 number, since 2×4013623² = 32218339172258, which contains 22 as substring.

Together with 4013621, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 4013623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4013621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2006811 + 2006812.

It is an arithmetic number, because the mean of its divisors is an integer number (2006812).

Almost surely, 2^4013623 is an apocalyptic number.

4013623 is a deficient number, since it is larger than the sum of its proper divisors (1).

4013623 is an equidigital number, since it uses as much as digits as its factorization.

4013623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 4013623 is about 2003.4028551442. The cubic root of 4013623 is about 158.9201107044.

Adding to 4013623 its reverse (3263104), we get a palindrome (7276727).

The spelling of 4013623 in words is "four million, thirteen thousand, six hundred twenty-three".