408623 has 2 divisors, whose sum is σ = 408624. Its totient is φ = 408622.

The previous prime is 408607. The next prime is 408631. The reversal of 408623 is 326804.

It is a happy number.

408623 is nontrivially palindromic in base 15.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 408623 - 2⁴ = 408607 is a prime.

It is a super-2 number, since 2×408623² = 333945512258, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 408623.

It is not a weakly prime, because it can be changed into another prime (408643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204311 + 204312.

It is an arithmetic number, because the mean of its divisors is an integer number (204312).

2⁴⁰⁸⁶²³ is an apocalyptic number.

408623 is a deficient number, since it is larger than the sum of its proper divisors (1).

408623 is an equidigital number, since it uses as much as digits as its factorization.

408623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 408623 is about 639.2362630515. The cubic root of 408623 is about 74.2063270324.

The spelling of 408623 in words is "four hundred eight thousand, six hundred twenty-three".