12739697 has 4 divisors (see below), whose sum is σ = 12785316. Its totient is φ = 12694080.

The previous prime is 12739691. The next prime is 12739703. The reversal of 12739697 is 79693721.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79693721 = 691 ⋅115331.

It is an interprime number because it is at equal distance from previous prime (12739691) and next prime (12739703).

It can be written as a sum of positive squares in 2 ways, for example, as 8755681 + 3984016 = 2959^2 + 1996^2 .

It is a cyclic number.

It is not a de Polignac number, because 12739697 - 2¹⁰ = 12738673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12739691) 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, 22388 + ... + 22949.

It is an arithmetic number, because the mean of its divisors is an integer number (3196329).

Almost surely, 2^12739697 is an apocalyptic number.

It is an amenable number.

12739697 is a deficient number, since it is larger than the sum of its proper divisors (45619).

12739697 is an equidigital number, since it uses as much as digits as its factorization.

12739697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45618.

The product of its digits is 142884, while the sum is 44.

The square root of 12739697 is about 3569.2712141276. The cubic root of 12739697 is about 233.5534926591.

The spelling of 12739697 in words is "twelve million, seven hundred thirty-nine thousand, six hundred ninety-seven".