12719389 has 4 divisors (see below), whose sum is σ = 13029660. Its totient is φ = 12409120.

The previous prime is 12719387. The next prime is 12719407. The reversal of 12719389 is 98391721.

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

It can be written as a sum of positive squares in 2 ways, for example, as 293764 + 12425625 = 542^2 + 3525^2 .

It is a cyclic number.

It is not a de Polignac number, because 12719389 - 2¹ = 12719387 is a prime.

It is a super-3 number, since 3×12719389³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12719387) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155074 + ... + 155155.

It is an arithmetic number, because the mean of its divisors is an integer number (3257415).

Almost surely, 2^12719389 is an apocalyptic number.

It is an amenable number.

12719389 is a deficient number, since it is larger than the sum of its proper divisors (310271).

12719389 is an equidigital number, since it uses as much as digits as its factorization.

12719389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310270.

The product of its digits is 27216, while the sum is 40.

The square root of 12719389 is about 3566.4252410502. The cubic root of 12719389 is about 233.4293262629.

The spelling of 12719389 in words is "twelve million, seven hundred nineteen thousand, three hundred eighty-nine".