123187399017 has 8 divisors (see below), whose sum is σ = 164257242240. Its totient is φ = 82121244240.

The previous prime is 123187398869. The next prime is 123187399087. The reversal of 123187399017 is 710993781321.

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

It is not a de Polignac number, because 123187399017 - 2¹² = 123187394921 is a prime.

It is a super-3 number, since 3×123187399017³ (a number of 34 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (123187399087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 843217 + ... + 978462.

It is an arithmetic number, because the mean of its divisors is an integer number (20532155280).

Almost surely, 2^123187399017 is an apocalyptic number.

It is an amenable number.

123187399017 is a deficient number, since it is larger than the sum of its proper divisors (41069843223).

123187399017 is a wasteful number, since it uses less digits than its factorization.

123187399017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1844223.

The product of its (nonzero) digits is 571536, while the sum is 51.

The spelling of 123187399017 in words is "one hundred twenty-three billion, one hundred eighty-seven million, three hundred ninety-nine thousand, seventeen".