12999663 has 8 divisors (see below), whose sum is σ = 19258800. Its totient is φ = 8666424.

The previous prime is 12999653. The next prime is 12999673. The reversal of 12999663 is 36699921.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12999653) and next prime (12999673).

It is not a de Polignac number, because 12999663 - 2¹⁷ = 12868591 is a prime.

It is a super-2 number, since 2×12999663² = 337982476227138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12999653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240708 + ... + 240761.

It is an arithmetic number, because the mean of its divisors is an integer number (2407350).

Almost surely, 2^12999663 is an apocalyptic number.

12999663 is a deficient number, since it is larger than the sum of its proper divisors (6259137).

12999663 is an equidigital number, since it uses as much as digits as its factorization.

12999663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481478 (or 481472 counting only the distinct ones).

The product of its digits is 157464, while the sum is 45.

The square root of 12999663 is about 3605.5045416696. The cubic root of 12999663 is about 235.1314369602.

The spelling of 12999663 in words is "twelve million, nine hundred ninety-nine thousand, six hundred sixty-three".