123950909 has 2 divisors, whose sum is σ = 123950910. Its totient is φ = 123950908.

The previous prime is 123950863. The next prime is 123950929. The reversal of 123950909 is 909059321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78765625 + 45185284 = 8875^2 + 6722^2 .

It is a cyclic number.

It is not a de Polignac number, because 123950909 - 2⁸ = 123950653 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 (123950929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61975454 + 61975455.

It is an arithmetic number, because the mean of its divisors is an integer number (61975455).

Almost surely, 2^123950909 is an apocalyptic number.

It is an amenable number.

123950909 is a deficient number, since it is larger than the sum of its proper divisors (1).

123950909 is an equidigital number, since it uses as much as digits as its factorization.

123950909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21870, while the sum is 38.

The square root of 123950909 is about 11133.3242564833. The cubic root of 123950909 is about 498.5972804357.

The spelling of 123950909 in words is "one hundred twenty-three million, nine hundred fifty thousand, nine hundred nine".