12320387 has 4 divisors (see below), whose sum is σ = 12856080. Its totient is φ = 11784696.

The previous prime is 12320369. The next prime is 12320401. The reversal of 12320387 is 78302321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78302321 = 199 ⋅393479.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12320387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12320587) 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, 267812 + ... + 267857.

It is an arithmetic number, because the mean of its divisors is an integer number (3214020).

Almost surely, 2^12320387 is an apocalyptic number.

12320387 is a deficient number, since it is larger than the sum of its proper divisors (535693).

12320387 is an equidigital number, since it uses as much as digits as its factorization.

12320387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535692.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 12320387 is about 3510.0408829528. The cubic root of 12320387 is about 230.9624883649.

The spelling of 12320387 in words is "twelve million, three hundred twenty thousand, three hundred eighty-seven".