123842047 has 8 divisors (see below), whose sum is σ = 141702176. Its totient is φ = 106024032.

The previous prime is 123842041. The next prime is 123842077. The reversal of 123842047 is 740248321.

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 123842047 - 2¹⁹ = 123317759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123842041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3948 + ... + 16225.

It is an arithmetic number, because the mean of its divisors is an integer number (17712772).

Almost surely, 2^123842047 is an apocalyptic number.

123842047 is a deficient number, since it is larger than the sum of its proper divisors (17860129).

123842047 is an equidigital number, since it uses as much as digits as its factorization.

It is an anagram of its base 9 representation: 123842047 = (278024314)₉.

123842047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21057.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 123842047 is about 11128.4341665843. The cubic root of 123842047 is about 498.4512704935.

The spelling of 123842047 in words is "one hundred twenty-three million, eight hundred forty-two thousand, forty-seven".