123238181 has 8 divisors (see below), whose sum is σ = 134525664. Its totient is φ = 111964720.

The previous prime is 123238121. The next prime is 123238187. The reversal of 123238181 is 181832321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123238181 is a prime.

It is a super-2 number, since 2×123238181² = 30375298512377522, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123238187) 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, 24986 + ... + 29508.

It is an arithmetic number, because the mean of its divisors is an integer number (16815708).

Almost surely, 2^123238181 is an apocalyptic number.

123238181 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123238181 is a deficient number, since it is larger than the sum of its proper divisors (11287483).

123238181 is a wasteful number, since it uses less digits than its factorization.

123238181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7011.

The product of its digits is 2304, while the sum is 29.

The square root of 123238181 is about 11101.2693418365. The cubic root of 123238181 is about 497.6397842941.

The spelling of 123238181 in words is "one hundred twenty-three million, two hundred thirty-eight thousand, one hundred eighty-one".