123263665 has 24 divisors (see below), whose sum is σ = 174030120. Its totient is φ = 83559168.

The previous prime is 123263663. The next prime is 123263689. The reversal of 123263665 is 566362321.

It can be written as a sum of positive squares in 4 ways, for example, as 11242609 + 112021056 = 3353^2 + 10584^2 .

It is not a de Polignac number, because 123263665 - 2¹ = 123263663 is a prime.

It is a super-2 number, since 2×123263665² = 30387862218464450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123263665.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123263663) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18979 + ... + 24631.

It is an arithmetic number, because the mean of its divisors is an integer number (7251255).

Almost surely, 2^123263665 is an apocalyptic number.

It is an amenable number.

123263665 is a deficient number, since it is larger than the sum of its proper divisors (50766455).

123263665 is an equidigital number, since it uses as much as digits as its factorization.

123263665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5761 (or 5754 counting only the distinct ones).

The product of its digits is 38880, while the sum is 34.

The square root of 123263665 is about 11102.4170791769. The cubic root of 123263665 is about 497.6740836704.

The spelling of 123263665 in words is "one hundred twenty-three million, two hundred sixty-three thousand, six hundred sixty-five".