123654547213 has 2 divisors, whose sum is σ = 123654547214. Its totient is φ = 123654547212.

The previous prime is 123654547199. The next prime is 123654547231. The reversal of 123654547213 is 312745456321.

Together with next prime (123654547231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110179516489 + 13475030724 = 331933^2 + 116082^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123654547213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123654547213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123654547243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61827273606 + 61827273607.

It is an arithmetic number, because the mean of its divisors is an integer number (61827273607).

Almost surely, 2^123654547213 is an apocalyptic number.

It is an amenable number.

123654547213 is a deficient number, since it is larger than the sum of its proper divisors (1).

123654547213 is an equidigital number, since it uses as much as digits as its factorization.

123654547213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 604800, while the sum is 43.

The spelling of 123654547213 in words is "one hundred twenty-three billion, six hundred fifty-four million, five hundred forty-seven thousand, two hundred thirteen".