123442153 has 2 divisors, whose sum is σ = 123442154. Its totient is φ = 123442152.

The previous prime is 123442139. The next prime is 123442157. The reversal of 123442153 is 351244321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119858704 + 3583449 = 10948^2 + 1893^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123442153 is a prime.

It is not a weakly prime, because it can be changed into another prime (123442157) 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, 61721076 + 61721077.

It is an arithmetic number, because the mean of its divisors is an integer number (61721077).

Almost surely, 2^123442153 is an apocalyptic number.

It is an amenable number.

123442153 is a deficient number, since it is larger than the sum of its proper divisors (1).

123442153 is an equidigital number, since it uses as much as digits as its factorization.

123442153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 25.

The square root of 123442153 is about 11110.4524210313. The cubic root of 123442153 is about 497.9141814885.

Adding to 123442153 its reverse (351244321), we get a palindrome (474686474).

The spelling of 123442153 in words is "one hundred twenty-three million, four hundred forty-two thousand, one hundred fifty-three".