123817841 has 4 divisors (see below), whose sum is σ = 141506112. Its totient is φ = 106129572.

The previous prime is 123817801. The next prime is 123817843. The reversal of 123817841 is 148718321.

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, and also an emirpimes, since its reverse is a distinct semiprime: 148718321 = 83 ⋅1791787.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123817841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123817843) 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, 8844125 + ... + 8844138.

It is an arithmetic number, because the mean of its divisors is an integer number (35376528).

Almost surely, 2^123817841 is an apocalyptic number.

It is an amenable number.

123817841 is a deficient number, since it is larger than the sum of its proper divisors (17688271).

123817841 is an equidigital number, since it uses as much as digits as its factorization.

123817841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17688270.

The product of its digits is 10752, while the sum is 35.

The square root of 123817841 is about 11127.3465390451. The cubic root of 123817841 is about 498.4187928390.

The spelling of 123817841 in words is "one hundred twenty-three million, eight hundred seventeen thousand, eight hundred forty-one".