123253647679 has 4 divisors (see below), whose sum is σ = 126584827384. Its totient is φ = 119922467976.

The previous prime is 123253647631. The next prime is 123253647733. The reversal of 123253647679 is 976746352321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 976746352321 = 7823 ⋅124855727.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123253647679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123253647079) 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 3 ways as a sum of consecutive naturals, for example, 1665589797 + ... + 1665589870.

It is an arithmetic number, because the mean of its divisors is an integer number (31646206846).

Almost surely, 2^123253647679 is an apocalyptic number.

123253647679 is a deficient number, since it is larger than the sum of its proper divisors (3331179705).

123253647679 is an equidigital number, since it uses as much as digits as its factorization.

123253647679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3331179704.

The product of its digits is 11430720, while the sum is 55.

The spelling of 123253647679 in words is "one hundred twenty-three billion, two hundred fifty-three million, six hundred forty-seven thousand, six hundred seventy-nine".