12403638727 has 4 divisors (see below), whose sum is σ = 12578337936. Its totient is φ = 12228939520.

The previous prime is 12403638721. The next prime is 12403638739. The reversal of 12403638727 is 72783630421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12403638727 - 2¹⁵ = 12403605959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12403638721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87349498 + ... + 87349639.

It is an arithmetic number, because the mean of its divisors is an integer number (3144584484).

Almost surely, 2^12403638727 is an apocalyptic number.

12403638727 is a deficient number, since it is larger than the sum of its proper divisors (174699209).

12403638727 is an equidigital number, since it uses as much as digits as its factorization.

12403638727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174699208.

The product of its (nonzero) digits is 338688, while the sum is 43.

The spelling of 12403638727 in words is "twelve billion, four hundred three million, six hundred thirty-eight thousand, seven hundred twenty-seven".