123618945 has 8 divisors (see below), whose sum is σ = 197790336. Its totient is φ = 65930096.

The previous prime is 123618931. The next prime is 123618947. The reversal of 123618945 is 549816321.

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

It is a cyclic number.

It is not a de Polignac number, because 123618945 - 2⁸ = 123618689 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (123618947) 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 7 ways as a sum of consecutive naturals, for example, 4120617 + ... + 4120646.

It is an arithmetic number, because the mean of its divisors is an integer number (24723792).

Almost surely, 2^123618945 is an apocalyptic number.

123618945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123618945 is a deficient number, since it is larger than the sum of its proper divisors (74171391).

123618945 is an equidigital number, since it uses as much as digits as its factorization.

123618945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8241271.

The product of its digits is 51840, while the sum is 39.

The square root of 123618945 is about 11118.4056860685. The cubic root of 123618945 is about 498.1517698419.

The spelling of 123618945 in words is "one hundred twenty-three million, six hundred eighteen thousand, nine hundred forty-five".