12388739 has 8 divisors (see below), whose sum is σ = 13585968. Its totient is φ = 11203360.

The previous prime is 12388721. The next prime is 12388751. The reversal of 12388739 is 93788321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12388739 - 2¹² = 12384643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12388696 and 12388705.

It is not an unprimeable number, because it can be changed into a prime (12388759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 692 + ... + 5025.

It is an arithmetic number, because the mean of its divisors is an integer number (1698246).

Almost surely, 2^12388739 is an apocalyptic number.

12388739 is a deficient number, since it is larger than the sum of its proper divisors (1197229).

12388739 is a wasteful number, since it uses less digits than its factorization.

12388739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5925.

The product of its digits is 72576, while the sum is 41.

The square root of 12388739 is about 3519.7640545923. The cubic root of 12388739 is about 231.3888181368.

The spelling of 12388739 in words is "twelve million, three hundred eighty-eight thousand, seven hundred thirty-nine".