123520499 has 2 divisors, whose sum is σ = 123520500. Its totient is φ = 123520498.

The previous prime is 123520493. The next prime is 123520531. The reversal of 123520499 is 994025321.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123520499 is a prime.

It is not a weakly prime, because it can be changed into another prime (123520493) 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, 61760249 + 61760250.

It is an arithmetic number, because the mean of its divisors is an integer number (61760250).

Almost surely, 2^123520499 is an apocalyptic number.

123520499 is a deficient number, since it is larger than the sum of its proper divisors (1).

123520499 is an equidigital number, since it uses as much as digits as its factorization.

123520499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 123520499 is about 11113.9776407909. The cubic root of 123520499 is about 498.0194975781.

The spelling of 123520499 in words is "one hundred twenty-three million, five hundred twenty thousand, four hundred ninety-nine".