123013431535 has 4 divisors (see below), whose sum is σ = 147616117848. Its totient is φ = 98410745224.

The previous prime is 123013431523. The next prime is 123013431551. The reversal of 123013431535 is 535134310321.

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 123013431535 - 2⁵ = 123013431503 is a prime.

It is a super-2 number, since 2×123013431535² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123013431497 and 123013431506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12301343149 + ... + 12301343158.

It is an arithmetic number, because the mean of its divisors is an integer number (36904029462).

Almost surely, 2^123013431535 is an apocalyptic number.

123013431535 is a deficient number, since it is larger than the sum of its proper divisors (24602686313).

123013431535 is an equidigital number, since it uses as much as digits as its factorization.

123013431535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24602686312.

The product of its (nonzero) digits is 16200, while the sum is 31.

Adding to 123013431535 its reverse (535134310321), we get a palindrome (658147741856).

The spelling of 123013431535 in words is "one hundred twenty-three billion, thirteen million, four hundred thirty-one thousand, five hundred thirty-five".