623417 has 2 divisors, whose sum is σ = 623418. Its totient is φ = 623416.

The previous prime is 623401. The next prime is 623423. The reversal of 623417 is 714326.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 609961 + 13456 = 781^2 + 116^2 .

It is a cyclic number.

It is not a de Polignac number, because 623417 - 2⁴ = 623401 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 623392 and 623401.

It is not a weakly prime, because it can be changed into another prime (623437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311708 + 311709.

It is an arithmetic number, because the mean of its divisors is an integer number (311709).

2⁶²³⁴¹⁷ is an apocalyptic number.

It is an amenable number.

623417 is a deficient number, since it is larger than the sum of its proper divisors (1).

623417 is an equidigital number, since it uses as much as digits as its factorization.

623417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 23.

The square root of 623417 is about 789.5676031854. The cubic root of 623417 is about 85.4265525209.

Subtracting 623417 from its reverse (714326), we obtain a palindrome (90909).

The spelling of 623417 in words is "six hundred twenty-three thousand, four hundred seventeen".