12345679 has 4 divisors (see below), whose sum is σ = 12679384.
Its totient is φ = 12011976.
The previous prime is 12345653. The next prime is 12345701. The reversal of 12345679 is 97654321.
It is a semiprime because it is the product of two primes.
It is not a de Polignac number, because 12345679 - 25 = 12345647 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 333667 = 12345679 / (1 + 2 + 3 + 4 + 5 + 6 + 7 + 9).
It is a deceptive number, since it divides R12345678.
It is a Duffinian number.
It is the 55-th primeval number, because it sets a new record (10542) in the number of distinct primes that is it possible to write using its digits.
It is a plaindrome in base 10.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (12345379) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166797 + ... + 166870.
It is an arithmetic number, because the mean of its divisors is an integer number (3169846).
Almost surely, 212345679 is an apocalyptic number.
12345679 is a deficient number, since it is larger than the sum of its proper divisors (333705).
12345679 is an equidigital number, since it uses as much as digits as its factorization.
12345679 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 333704.
The product of its digits is 45360, while the sum is 37.
The square root of 12345679 is about 3513.6418428747.
The cubic root of 12345679 is about 231.1204247065.
The spelling of 12345679 in words is "twelve million, three hundred forty-five thousand, six hundred seventy-nine".