123228447 has 4 divisors (see below), whose sum is σ = 164304600. Its totient is φ = 82152296.

The previous prime is 123228409. The next prime is 123228451. The reversal of 123228447 is 744822321.

It is a happy number.

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 123228447 - 2¹² = 123224351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123228467) 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, 20538072 + ... + 20538077.

It is an arithmetic number, because the mean of its divisors is an integer number (41076150).

Almost surely, 2^123228447 is an apocalyptic number.

123228447 is a deficient number, since it is larger than the sum of its proper divisors (41076153).

123228447 is an equidigital number, since it uses as much as digits as its factorization.

123228447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41076152.

The product of its digits is 21504, while the sum is 33.

The square root of 123228447 is about 11100.8309148460. The cubic root of 123228447 is about 497.6266818796.

The spelling of 123228447 in words is "one hundred twenty-three million, two hundred twenty-eight thousand, four hundred forty-seven".