123740842863017 has 2 divisors, whose sum is σ = 123740842863018. Its totient is φ = 123740842863016.

The previous prime is 123740842862993. The next prime is 123740842863073. The reversal of 123740842863017 is 710368248047321.

It is an a-pointer prime, because the next prime (123740842863073) can be obtained adding 123740842863017 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98197714594576 + 25543128268441 = 9909476^2 + 5054021^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123740842863017 is a prime.

It is not a weakly prime, because it can be changed into another prime (123740842863817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61870421431508 + 61870421431509.

It is an arithmetic number, because the mean of its divisors is an integer number (61870421431509).

Almost surely, 2^{123740842863017} is an apocalyptic number.

It is an amenable number.

123740842863017 is a deficient number, since it is larger than the sum of its proper divisors (1).

123740842863017 is an equidigital number, since it uses as much as digits as its factorization.

123740842863017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10838016, while the sum is 56.

The spelling of 123740842863017 in words is "one hundred twenty-three trillion, seven hundred forty billion, eight hundred forty-two million, eight hundred sixty-three thousand, seventeen".