12988739 has 4 divisors (see below), whose sum is σ = 13339824. Its totient is φ = 12637656.

The previous prime is 12988711. The next prime is 12988747. The reversal of 12988739 is 93788921.

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 12988739 - 2⁸ = 12988483 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12988693 and 12988702.

It is not an unprimeable number, because it can be changed into a prime (12988769) 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, 175487 + ... + 175560.

It is an arithmetic number, because the mean of its divisors is an integer number (3334956).

Almost surely, 2^12988739 is an apocalyptic number.

12988739 is a deficient number, since it is larger than the sum of its proper divisors (351085).

12988739 is an equidigital number, since it uses as much as digits as its factorization.

12988739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351084.

The product of its digits is 217728, while the sum is 47.

The square root of 12988739 is about 3603.9893174093. The cubic root of 12988739 is about 235.0655558770.

The spelling of 12988739 in words is "twelve million, nine hundred eighty-eight thousand, seven hundred thirty-nine".