312123663 has 18 divisors (see below), whose sum is σ = 460974384. Its totient is φ = 203418072.

The previous prime is 312123661. The next prime is 312123683. The reversal of 312123663 is 366321213.

It is a happy number.

It is not a de Polignac number, because 312123663 - 2¹ = 312123661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312123661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 362928 + ... + 363786.

It is an arithmetic number, because the mean of its divisors is an integer number (25609688).

Almost surely, 2^312123663 is an apocalyptic number.

312123663 is a deficient number, since it is larger than the sum of its proper divisors (148850721).

312123663 is an frugal number, since it uses more digits than its factorization.

312123663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771 (or 909 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 312123663 is about 17667.0219052335. The cubic root of 312123663 is about 678.3318851812.

Adding to 312123663 its reverse (366321213), we get a palindrome (678444876).

The spelling of 312123663 in words is "three hundred twelve million, one hundred twenty-three thousand, six hundred sixty-three".