123975447 has 4 divisors (see below), whose sum is σ = 165300600. Its totient is φ = 82650296.

The previous prime is 123975391. The next prime is 123975457. The reversal of 123975447 is 744579321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123975447 - 2¹⁰ = 123974423 is a prime.

It is a super-2 number, since 2×123975447² = 30739822917699618, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123975399 and 123975408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123975457) 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 3 ways as a sum of consecutive naturals, for example, 20662572 + ... + 20662577.

It is an arithmetic number, because the mean of its divisors is an integer number (41325150).

Almost surely, 2^123975447 is an apocalyptic number.

123975447 is a deficient number, since it is larger than the sum of its proper divisors (41325153).

123975447 is an equidigital number, since it uses as much as digits as its factorization.

123975447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41325152.

The product of its digits is 211680, while the sum is 42.

The square root of 123975447 is about 11134.4262088354. The cubic root of 123975447 is about 498.6301799465.

The spelling of 123975447 in words is "one hundred twenty-three million, nine hundred seventy-five thousand, four hundred forty-seven".