123939823 has 8 divisors (see below), whose sum is σ = 146530080. Its totient is φ = 102570720.

The previous prime is 123939817. The next prime is 123939853. The reversal of 123939823 is 328939321.

It is a happy number.

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

It is not a de Polignac number, because 123939823 - 2⁵ = 123939791 is a prime.

It is a super-2 number, since 2×123939823² = 30722159450542658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123939853) 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, 305068 + ... + 305473.

It is an arithmetic number, because the mean of its divisors is an integer number (18316260).

Almost surely, 2^123939823 is an apocalyptic number.

123939823 is a deficient number, since it is larger than the sum of its proper divisors (22590257).

123939823 is an equidigital number, since it uses as much as digits as its factorization.

123939823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610577.

The product of its digits is 69984, while the sum is 40.

The square root of 123939823 is about 11132.8263706931. The cubic root of 123939823 is about 498.5824153726.

The spelling of 123939823 in words is "one hundred twenty-three million, nine hundred thirty-nine thousand, eight hundred twenty-three".