123171893 has 8 divisors (see below), whose sum is σ = 133539000. Its totient is φ = 112932288.

The previous prime is 123171887. The next prime is 123171899. The reversal of 123171893 is 398171321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (123171887) and next prime (123171899).

It can be written as a sum of positive squares in 4 ways, for example, as 7006609 + 116165284 = 2647^2 + 10778^2 .

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 123171893 - 2¹⁰ = 123170869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123171899) 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, 29858 + ... + 33731.

It is an arithmetic number, because the mean of its divisors is an integer number (16692375).

Almost surely, 2^123171893 is an apocalyptic number.

123171893 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

123171893 is a deficient number, since it is larger than the sum of its proper divisors (10367107).

123171893 is a wasteful number, since it uses less digits than its factorization.

123171893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63751.

The product of its digits is 9072, while the sum is 35.

The square root of 123171893 is about 11098.2833357236. The cubic root of 123171893 is about 497.5505439250.

The spelling of 123171893 in words is "one hundred twenty-three million, one hundred seventy-one thousand, eight hundred ninety-three".