123103187 has 4 divisors (see below), whose sum is σ = 124940616. Its totient is φ = 121265760.

The previous prime is 123103163. The next prime is 123103207. The reversal of 123103187 is 781301321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 781301321 = 10477 ⋅74573.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123103187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123103157) 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 3 ways as a sum of consecutive naturals, for example, 918614 + ... + 918747.

It is an arithmetic number, because the mean of its divisors is an integer number (31235154).

Almost surely, 2^123103187 is an apocalyptic number.

123103187 is a deficient number, since it is larger than the sum of its proper divisors (1837429).

123103187 is an equidigital number, since it uses as much as digits as its factorization.

123103187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837428.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 123103187 is about 11095.1875603795. The cubic root of 123103187 is about 497.4580145203.

The spelling of 123103187 in words is "one hundred twenty-three million, one hundred three thousand, one hundred eighty-seven".