123005553 has 8 divisors (see below), whose sum is σ = 178917216. Its totient is φ = 74548800.

The previous prime is 123005537. The next prime is 123005567. The reversal of 123005553 is 355500321.

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

It is not a de Polignac number, because 123005553 - 2⁴ = 123005537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123001553) 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, 1863688 + ... + 1863753.

It is an arithmetic number, because the mean of its divisors is an integer number (22364652).

Almost surely, 2^123005553 is an apocalyptic number.

It is an amenable number.

123005553 is a deficient number, since it is larger than the sum of its proper divisors (55911663).

123005553 is a wasteful number, since it uses less digits than its factorization.

123005553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3727455.

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 123005553 is about 11090.7868521580. The cubic root of 123005553 is about 497.3264672584.

Adding to 123005553 its reverse (355500321), we get a palindrome (478505874).

The spelling of 123005553 in words is "one hundred twenty-three million, five thousand, five hundred fifty-three".