123221849 has 4 divisors (see below), whose sum is σ = 124957440. Its totient is φ = 121486260.

The previous prime is 123221843. The next prime is 123221863. The reversal of 123221849 is 948122321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123221849 - 2²⁰ = 122173273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123221843) 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, 867689 + ... + 867830.

It is an arithmetic number, because the mean of its divisors is an integer number (31239360).

Almost surely, 2^123221849 is an apocalyptic number.

It is an amenable number.

123221849 is a deficient number, since it is larger than the sum of its proper divisors (1735591).

123221849 is an equidigital number, since it uses as much as digits as its factorization.

123221849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1735590.

The product of its digits is 6912, while the sum is 32.

The square root of 123221849 is about 11100.5337259071. The cubic root of 123221849 is about 497.6178002738.

The spelling of 123221849 in words is "one hundred twenty-three million, two hundred twenty-one thousand, eight hundred forty-nine".