308146133 has 2 divisors, whose sum is σ = 308146134. Its totient is φ = 308146132.

The previous prime is 308146109. The next prime is 308146151. The reversal of 308146133 is 331641803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 279491524 + 28654609 = 16718^2 + 5353^2 .

It is an emirp because it is prime and its reverse (331641803) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 308146133 - 2²² = 303951829 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 308146096 and 308146105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (308146103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154073066 + 154073067.

It is an arithmetic number, because the mean of its divisors is an integer number (154073067).

Almost surely, 2^308146133 is an apocalyptic number.

It is an amenable number.

308146133 is a deficient number, since it is larger than the sum of its proper divisors (1).

308146133 is an equidigital number, since it uses as much as digits as its factorization.

308146133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 308146133 is about 17554.0916312978. The cubic root of 308146133 is about 675.4381301881.

Adding to 308146133 its reverse (331641803), we get a palindrome (639787936).

The spelling of 308146133 in words is "three hundred eight million, one hundred forty-six thousand, one hundred thirty-three".