124209999973 has 2 divisors, whose sum is σ = 124209999974. Its totient is φ = 124209999972.

The previous prime is 124209999971. The next prime is 124210000027. The reversal of 124209999973 is 379999902421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64743275809 + 59466724164 = 254447^2 + 243858^2 .

It is a cyclic number.

It is not a de Polignac number, because 124209999973 - 2¹ = 124209999971 is a prime.

Together with 124209999971, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124209999971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62104999986 + 62104999987.

It is an arithmetic number, because the mean of its divisors is an integer number (62104999987).

Almost surely, 2^124209999973 is an apocalyptic number.

It is an amenable number.

124209999973 is a deficient number, since it is larger than the sum of its proper divisors (1).

124209999973 is an equidigital number, since it uses as much as digits as its factorization.

124209999973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19840464, while the sum is 64.

The spelling of 124209999973 in words is "one hundred twenty-four billion, two hundred nine million, nine hundred ninety-nine thousand, nine hundred seventy-three".