12346789 has 32 divisors (see below), whose sum is σ = 16513280.
Its totient is φ = 8957952.
The previous prime is 12346723. The next prime is 12346793. The reversal of 12346789 is 98764321.
It is a 7-Lehmer number, since φ(12346789) divides (12346789-1)7.
It is a cyclic number.
It is not a de Polignac number, because 12346789 - 27 = 12346661 is a prime.
It is a super-2 number, since 2×123467892 = 304886397221042, which contains 22 as substring.
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 (12346589) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is an upside-down number.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63877 + ... + 64069.
It is an arithmetic number, because the mean of its divisors is an integer number (516040).
Almost surely, 212346789 is an apocalyptic number.
12346789 is a gapful number since it is divisible by the number (19) formed by its first and last digit.
It is an amenable number.
12346789 is a deficient number, since it is larger than the sum of its proper divisors (4166491).
12346789 is a wasteful number, since it uses less digits than its factorization.
12346789 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 269.
The product of its digits is 72576, while the sum is 40.
The square root of 12346789 is about 3513.7997950936.
The cubic root of 12346789 is about 231.1273511781.
The spelling of 12346789 in words is "twelve million, three hundred forty-six thousand, seven hundred eighty-nine".