124390709 has 2 divisors, whose sum is σ = 124390710. Its totient is φ = 124390708.

The previous prime is 124390687. The next prime is 124390729. The reversal of 124390709 is 907093421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75082225 + 49308484 = 8665^2 + 7022^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124390709 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124390729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62195354 + 62195355.

It is an arithmetic number, because the mean of its divisors is an integer number (62195355).

Almost surely, 2^124390709 is an apocalyptic number.

It is an amenable number.

124390709 is a deficient number, since it is larger than the sum of its proper divisors (1).

124390709 is an equidigital number, since it uses as much as digits as its factorization.

124390709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 124390709 is about 11153.0582801311. The cubic root of 124390709 is about 499.1862884655.

The spelling of 124390709 in words is "one hundred twenty-four million, three hundred ninety thousand, seven hundred nine".