12667397 has 4 divisors (see below), whose sum is σ = 13412556. Its totient is φ = 11922240.

The previous prime is 12667387. The next prime is 12667427. The reversal of 12667397 is 79376621.

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 9278116 + 3389281 = 3046^2 + 1841^2 .

It is a cyclic number.

It is not a de Polignac number, because 12667397 - 2⁴ = 12667381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12667337) 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, 372554 + ... + 372587.

It is an arithmetic number, because the mean of its divisors is an integer number (3353139).

Almost surely, 2^12667397 is an apocalyptic number.

12667397 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12667397 is a deficient number, since it is larger than the sum of its proper divisors (745159).

12667397 is an equidigital number, since it uses as much as digits as its factorization.

12667397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745158.

The product of its digits is 95256, while the sum is 41.

The square root of 12667397 is about 3559.1286855072. The cubic root of 12667397 is about 233.1108352938.

The spelling of 12667397 in words is "twelve million, six hundred sixty-seven thousand, three hundred ninety-seven".