123253647631 has 2 divisors, whose sum is σ = 123253647632. Its totient is φ = 123253647630.

The previous prime is 123253647593. The next prime is 123253647733. The reversal of 123253647631 is 136746352321.

It is a weak prime.

It is an emirp because it is prime and its reverse (136746352321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123253647631 is a prime.

It is a super-2 number, since 2×123253647631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123253647031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61626823815 + 61626823816.

It is an arithmetic number, because the mean of its divisors is an integer number (61626823816).

Almost surely, 2^123253647631 is an apocalyptic number.

123253647631 is a deficient number, since it is larger than the sum of its proper divisors (1).

123253647631 is an equidigital number, since it uses as much as digits as its factorization.

123253647631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 43.

Adding to 123253647631 its reverse (136746352321), we get a palindrome (259999999952).

It can be divided in two parts, 123253 and 647631, that added together give a square (770884 = 878²).

The spelling of 123253647631 in words is "one hundred twenty-three billion, two hundred fifty-three million, six hundred forty-seven thousand, six hundred thirty-one".