123687017 has 4 divisors (see below), whose sum is σ = 130196880. Its totient is φ = 117177156.

The previous prime is 123687013. The next prime is 123687023. The reversal of 123687017 is 710786321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123687017 - 2² = 123687013 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123687013) 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, 3254903 + ... + 3254940.

It is an arithmetic number, because the mean of its divisors is an integer number (32549220).

Almost surely, 2^123687017 is an apocalyptic number.

It is an amenable number.

123687017 is a deficient number, since it is larger than the sum of its proper divisors (6509863).

123687017 is an equidigital number, since it uses as much as digits as its factorization.

123687017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6509862.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 123687017 is about 11121.4664950266. The cubic root of 123687017 is about 498.2431904701.

The spelling of 123687017 in words is "one hundred twenty-three million, six hundred eighty-seven thousand, seventeen".