123254960861 has 2 divisors, whose sum is σ = 123254960862. Its totient is φ = 123254960860.

The previous prime is 123254960831. The next prime is 123254960987. The reversal of 123254960861 is 168069452321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120652022500 + 2602938361 = 347350^2 + 51019^2 .

It is an emirp because it is prime and its reverse (168069452321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123254960861 - 2¹⁸ = 123254698717 is a prime.

It is a super-2 number, since 2×123254960861² (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 (123254960831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61627480430 + 61627480431.

It is an arithmetic number, because the mean of its divisors is an integer number (61627480431).

Almost surely, 2^123254960861 is an apocalyptic number.

It is an amenable number.

123254960861 is a deficient number, since it is larger than the sum of its proper divisors (1).

123254960861 is an equidigital number, since it uses as much as digits as its factorization.

123254960861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 123254960861 in words is "one hundred twenty-three billion, two hundred fifty-four million, nine hundred sixty thousand, eight hundred sixty-one".