808145123 has 2 divisors, whose sum is σ = 808145124. Its totient is φ = 808145122.

The previous prime is 808145101. The next prime is 808145147. The reversal of 808145123 is 321541808.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 808145123 - 2¹⁸ = 807882979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 808145123.

It is not a weakly prime, because it can be changed into another prime (808145423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404072561 + 404072562.

It is an arithmetic number, because the mean of its divisors is an integer number (404072562).

Almost surely, 2^808145123 is an apocalyptic number.

808145123 is a deficient number, since it is larger than the sum of its proper divisors (1).

808145123 is an equidigital number, since it uses as much as digits as its factorization.

808145123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 808145123 is about 28427.8933971548. The cubic root of 808145123 is about 931.4576605321.

The spelling of 808145123 in words is "eight hundred eight million, one hundred forty-five thousand, one hundred twenty-three".