308142823 has 2 divisors, whose sum is σ = 308142824. Its totient is φ = 308142822.

The previous prime is 308142803. The next prime is 308142827. The reversal of 308142823 is 328241803.

It is a strong prime.

It is an emirp because it is prime and its reverse (328241803) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 308142823 - 2⁹ = 308142311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (308142827) 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, 154071411 + 154071412.

It is an arithmetic number, because the mean of its divisors is an integer number (154071412).

Almost surely, 2^308142823 is an apocalyptic number.

308142823 is a deficient number, since it is larger than the sum of its proper divisors (1).

308142823 is an equidigital number, since it uses as much as digits as its factorization.

308142823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 308142823 is about 17553.9973510309. The cubic root of 308142823 is about 675.4357117379.

The spelling of 308142823 in words is "three hundred eight million, one hundred forty-two thousand, eight hundred twenty-three".