123543253 has 2 divisors, whose sum is σ = 123543254. Its totient is φ = 123543252.

The previous prime is 123543191. The next prime is 123543269. The reversal of 123543253 is 352345321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103266244 + 20277009 = 10162^2 + 4503^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123543253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123543653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61771626 + 61771627.

It is an arithmetic number, because the mean of its divisors is an integer number (61771627).

Almost surely, 2^123543253 is an apocalyptic number.

It is an amenable number.

123543253 is a deficient number, since it is larger than the sum of its proper divisors (1).

123543253 is an equidigital number, since it uses as much as digits as its factorization.

123543253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 28.

The square root of 123543253 is about 11115.0012595591. The cubic root of 123543253 is about 498.0500761459.

Subtracting from 123543253 its sum of digits (28), we obtain a square (123543225 = 11115²).

Adding to 123543253 its reverse (352345321), we get a palindrome (475888574).

The spelling of 123543253 in words is "one hundred twenty-three million, five hundred forty-three thousand, two hundred fifty-three".