123553345 has 4 divisors (see below), whose sum is σ = 148264020. Its totient is φ = 98842672.

The previous prime is 123553337. The next prime is 123553349. The reversal of 123553345 is 543355321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543355321 = 31 ⋅17527591.

It can be written as a sum of positive squares in 2 ways, for example, as 85063729 + 38489616 = 9223^2 + 6204^2 .

It is a cyclic number.

It is not a de Polignac number, because 123553345 - 2³ = 123553337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123553349) 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 3 ways as a sum of consecutive naturals, for example, 12355330 + ... + 12355339.

It is an arithmetic number, because the mean of its divisors is an integer number (37066005).

Almost surely, 2^123553345 is an apocalyptic number.

It is an amenable number.

123553345 is a deficient number, since it is larger than the sum of its proper divisors (24710675).

123553345 is an equidigital number, since it uses as much as digits as its factorization.

123553345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24710674.

The product of its digits is 27000, while the sum is 31.

The square root of 123553345 is about 11115.4552313434. The cubic root of 123553345 is about 498.0636373465.

The spelling of 123553345 in words is "one hundred twenty-three million, five hundred fifty-three thousand, three hundred forty-five".