123081553 has 8 divisors (see below), whose sum is σ = 142646400. Its totient is φ = 104012160.

The previous prime is 123081503. The next prime is 123081557. The reversal of 123081553 is 355180321.

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

It is not a de Polignac number, because 123081553 - 2⁹ = 123081041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123081557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123328 + ... + 124321.

It is an arithmetic number, because the mean of its divisors is an integer number (17830800).

Almost surely, 2^123081553 is an apocalyptic number.

It is an amenable number.

123081553 is a deficient number, since it is larger than the sum of its proper divisors (19564847).

123081553 is an equidigital number, since it uses as much as digits as its factorization.

123081553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247727.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 123081553 is about 11094.2125903554. The cubic root of 123081553 is about 497.4288719302.

It can be divided in two parts, 12308 and 1553, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 123081553 in words is "one hundred twenty-three million, eighty-one thousand, five hundred fifty-three".