124720709 has 2 divisors, whose sum is σ = 124720710. Its totient is φ = 124720708.

The previous prime is 124720703. The next prime is 124720711. The reversal of 124720709 is 907027421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81450625 + 43270084 = 9025^2 + 6578^2 .

It is a cyclic number.

It is not a de Polignac number, because 124720709 - 2¹⁶ = 124655173 is a prime.

It is a Sophie Germain prime.

Together with 124720711, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is equal to p_7095155 and since 124720709 and 7095155 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124720703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62360354 + 62360355.

It is an arithmetic number, because the mean of its divisors is an integer number (62360355).

Almost surely, 2^124720709 is an apocalyptic number.

It is an amenable number.

124720709 is a deficient number, since it is larger than the sum of its proper divisors (1).

124720709 is an equidigital number, since it uses as much as digits as its factorization.

124720709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 124720709 is about 11167.8426296219. The cubic root of 124720709 is about 499.6273343096.

The spelling of 124720709 in words is "one hundred twenty-four million, seven hundred twenty thousand, seven hundred nine".