1200123663 has 16 divisors (see below), whose sum is σ = 1624530816. Its totient is φ = 787987040.

The previous prime is 1200123641. The next prime is 1200123667. The reversal of 1200123663 is 3663210021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1200123663 - 2⁶ = 1200123599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200123667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44728 + ... + 66338.

It is an arithmetic number, because the mean of its divisors is an integer number (101533176).

Almost surely, 2^1200123663 is an apocalyptic number.

1200123663 is a deficient number, since it is larger than the sum of its proper divisors (424407153).

1200123663 is a wasteful number, since it uses less digits than its factorization.

1200123663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21894.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 1200123663 is about 34642.8010270532. The cubic root of 1200123663 is about 1062.6950711362.

Adding to 1200123663 its reverse (3663210021), we get a palindrome (4863333684).

The spelling of 1200123663 in words is "one billion, two hundred million, one hundred twenty-three thousand, six hundred sixty-three".