123343431345 has 32 divisors (see below), whose sum is σ = 219419692800. Its totient is φ = 65740419072.

The previous prime is 123343431283. The next prime is 123343431349. The reversal of 123343431345 is 543134343321.

123343431345 is a `hidden beast` number, since 1 + 2 + 334 + 3 + 4 + 313 + 4 + 5 = 666.

It is not a de Polignac number, because 123343431345 - 2¹⁶ = 123343365809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123343431349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87760 + ... + 504369.

It is an arithmetic number, because the mean of its divisors is an integer number (6856865400).

Almost surely, 2^123343431345 is an apocalyptic number.

123343431345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123343431345 is a deficient number, since it is larger than the sum of its proper divisors (96076261455).

123343431345 is a wasteful number, since it uses less digits than its factorization.

123343431345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593686 (or 593680 counting only the distinct ones).

The product of its digits is 155520, while the sum is 36.

Adding to 123343431345 its reverse (543134343321), we get a palindrome (666477774666).

The spelling of 123343431345 in words is "one hundred twenty-three billion, three hundred forty-three million, four hundred thirty-one thousand, three hundred forty-five".