123432553 has 2 divisors, whose sum is σ = 123432554. Its totient is φ = 123432552.

The previous prime is 123432541. The next prime is 123432557. The reversal of 123432553 is 355234321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112954384 + 10478169 = 10628^2 + 3237^2 .

It is a cyclic number.

It is not a de Polignac number, because 123432553 - 2⁵ = 123432521 is a prime.

It is equal to p_7025932 and since 123432553 and 7025932 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (123432557) 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, 61716276 + 61716277.

It is an arithmetic number, because the mean of its divisors is an integer number (61716277).

Almost surely, 2^123432553 is an apocalyptic number.

It is an amenable number.

123432553 is a deficient number, since it is larger than the sum of its proper divisors (1).

123432553 is an equidigital number, since it uses as much as digits as its factorization.

123432553 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 123432553 is about 11110.0203870200. The cubic root of 123432553 is about 497.9012736879.

Adding to 123432553 its reverse (355234321), we get a palindrome (478666874).

The spelling of 123432553 in words is "one hundred twenty-three million, four hundred thirty-two thousand, five hundred fifty-three".