123053809 has 2 divisors, whose sum is σ = 123053810. Its totient is φ = 123053808.

The previous prime is 123053807. The next prime is 123053857. The reversal of 123053809 is 908350321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110838784 + 12215025 = 10528^2 + 3495^2 .

It is a cyclic number.

It is not a de Polignac number, because 123053809 - 2¹ = 123053807 is a prime.

Together with 123053807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (123053807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61526904 + 61526905.

It is an arithmetic number, because the mean of its divisors is an integer number (61526905).

Almost surely, 2^123053809 is an apocalyptic number.

It is an amenable number.

123053809 is a deficient number, since it is larger than the sum of its proper divisors (1).

123053809 is an equidigital number, since it uses as much as digits as its factorization.

123053809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 123053809 is about 11092.9621382208. The cubic root of 123053809 is about 497.3914937221.

The spelling of 123053809 in words is "one hundred twenty-three million, fifty-three thousand, eight hundred nine".