123663931 has 2 divisors, whose sum is σ = 123663932. Its totient is φ = 123663930.

The previous prime is 123663907. The next prime is 123663949. The reversal of 123663931 is 139366321.

It is a strong prime.

It is an emirp because it is prime and its reverse (139366321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123663931 - 2⁷ = 123663803 is a prime.

It is a super-2 number, since 2×123663931² = 30585535660745522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123663901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61831965 + 61831966.

It is an arithmetic number, because the mean of its divisors is an integer number (61831966).

Almost surely, 2^123663931 is an apocalyptic number.

123663931 is a deficient number, since it is larger than the sum of its proper divisors (1).

123663931 is an equidigital number, since it uses as much as digits as its factorization.

123663931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 34.

The square root of 123663931 is about 11120.4285439006. The cubic root of 123663931 is about 498.2121897548.

The spelling of 123663931 in words is "one hundred twenty-three million, six hundred sixty-three thousand, nine hundred thirty-one".