123201623 has 2 divisors, whose sum is σ = 123201624. Its totient is φ = 123201622.

The previous prime is 123201613. The next prime is 123201629. The reversal of 123201623 is 326102321.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123201623 - 2⁴ = 123201607 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 123201595 and 123201604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123201629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61600811 + 61600812.

It is an arithmetic number, because the mean of its divisors is an integer number (61600812).

Almost surely, 2^123201623 is an apocalyptic number.

123201623 is a deficient number, since it is larger than the sum of its proper divisors (1).

123201623 is an equidigital number, since it uses as much as digits as its factorization.

123201623 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 20.

The square root of 123201623 is about 11099.6226512436. The cubic root of 123201623 is about 497.5905719631.

Adding to 123201623 its reverse (326102321), we get a palindrome (449303944).

The spelling of 123201623 in words is "one hundred twenty-three million, two hundred one thousand, six hundred twenty-three".