123949943 has 8 divisors (see below), whose sum is σ = 133963536. Its totient is φ = 114004800.

The previous prime is 123949937. The next prime is 123949961. The reversal of 123949943 is 349949321.

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

It is not a de Polignac number, because 123949943 - 2¹² = 123945847 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123949894 and 123949903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123949993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13313 + ... + 20618.

It is an arithmetic number, because the mean of its divisors is an integer number (16745442).

Almost surely, 2^123949943 is an apocalyptic number.

123949943 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

123949943 is a deficient number, since it is larger than the sum of its proper divisors (10013593).

123949943 is a wasteful number, since it uses less digits than its factorization.

123949943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34225.

The product of its digits is 209952, while the sum is 44.

The square root of 123949943 is about 11133.2808731299. The cubic root of 123949943 is about 498.5959851750.

The spelling of 123949943 in words is "one hundred twenty-three million, nine hundred forty-nine thousand, nine hundred forty-three".