123906017 has 4 divisors (see below), whose sum is σ = 123928980. Its totient is φ = 123883056.

The previous prime is 123905993. The next prime is 123906023. The reversal of 123906017 is 710609321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18309841 + 105596176 = 4279^2 + 10276^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123906017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123906317) 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, 1523 + ... + 15815.

It is an arithmetic number, because the mean of its divisors is an integer number (30982245).

Almost surely, 2^123906017 is an apocalyptic number.

It is an amenable number.

123906017 is a deficient number, since it is larger than the sum of its proper divisors (22963).

123906017 is an equidigital number, since it uses as much as digits as its factorization.

123906017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22962.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 123906017 is about 11131.3079644757. The cubic root of 123906017 is about 498.5370799040.

The spelling of 123906017 in words is "one hundred twenty-three million, nine hundred six thousand, seventeen".