12697969 has 4 divisors (see below), whose sum is σ = 13135860. Its totient is φ = 12260080.

The previous prime is 12697967. The next prime is 12697973. The reversal of 12697969 is 96979621.

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 9529569 + 3168400 = 3087^2 + 1780^2 .

It is a cyclic number.

It is not a de Polignac number, because 12697969 - 2¹ = 12697967 is a prime.

It is a super-2 number, since 2×12697969² = 322476833449922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12697967) 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, 218902 + ... + 218959.

It is an arithmetic number, because the mean of its divisors is an integer number (3283965).

Almost surely, 2^12697969 is an apocalyptic number.

It is an amenable number.

12697969 is a deficient number, since it is larger than the sum of its proper divisors (437891).

12697969 is an equidigital number, since it uses as much as digits as its factorization.

12697969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437890.

The product of its digits is 367416, while the sum is 49.

The square root of 12697969 is about 3563.4209686760. The cubic root of 12697969 is about 233.2982176180.

The spelling of 12697969 in words is "twelve million, six hundred ninety-seven thousand, nine hundred sixty-nine".