123980709901 has 2 divisors, whose sum is σ = 123980709902. Its totient is φ = 123980709900.

The previous prime is 123980709887. The next prime is 123980709917. The reversal of 123980709901 is 109907089321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78609579876 + 45371130025 = 280374^2 + 213005^2 .

It is an emirp because it is prime and its reverse (109907089321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123980709901 - 2⁵ = 123980709869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123980709701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61990354950 + 61990354951.

It is an arithmetic number, because the mean of its divisors is an integer number (61990354951).

Almost surely, 2^123980709901 is an apocalyptic number.

It is an amenable number.

123980709901 is a deficient number, since it is larger than the sum of its proper divisors (1).

123980709901 is an equidigital number, since it uses as much as digits as its factorization.

123980709901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 49.

The spelling of 123980709901 in words is "one hundred twenty-three billion, nine hundred eighty million, seven hundred nine thousand, nine hundred one".