123845109 has 8 divisors (see below), whose sum is σ = 170820960. Its totient is φ = 79716336.

The previous prime is 123845107. The next prime is 123845129. The reversal of 123845109 is 901548321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123845109 - 2¹ = 123845107 is a prime.

It is a super-2 number, since 2×123845109² = 30675222046443762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123845109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123845107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 711667 + ... + 711840.

It is an arithmetic number, because the mean of its divisors is an integer number (21352620).

Almost surely, 2^123845109 is an apocalyptic number.

It is an amenable number.

123845109 is a deficient number, since it is larger than the sum of its proper divisors (46975851).

123845109 is a wasteful number, since it uses less digits than its factorization.

123845109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423539.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 123845109 is about 11128.5717412433. The cubic root of 123845109 is about 498.4553785361.

The spelling of 123845109 in words is "one hundred twenty-three million, eight hundred forty-five thousand, one hundred nine".