123502343431 has 4 divisors (see below), whose sum is σ = 123503555952. Its totient is φ = 123501130912.

The previous prime is 123502343411. The next prime is 123502343443. The reversal of 123502343431 is 134343205321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123502343431 - 2¹⁹ = 123501819143 is a prime.

It is a super-2 number, since 2×123502343431² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123502343393 and 123502343402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123502343411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 437890 + ... + 662383.

It is an arithmetic number, because the mean of its divisors is an integer number (30875888988).

Almost surely, 2^123502343431 is an apocalyptic number.

123502343431 is a deficient number, since it is larger than the sum of its proper divisors (1212521).

123502343431 is a wasteful number, since it uses less digits than its factorization.

123502343431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212520.

The product of its (nonzero) digits is 25920, while the sum is 31.

Adding to 123502343431 its reverse (134343205321), we get a palindrome (257845548752).

The spelling of 123502343431 in words is "one hundred twenty-three billion, five hundred two million, three hundred forty-three thousand, four hundred thirty-one".