305172113 has 2 divisors, whose sum is σ = 305172114. Its totient is φ = 305172112.

The previous prime is 305172107. The next prime is 305172157. The reversal of 305172113 is 311271503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230037889 + 75134224 = 15167^2 + 8668^2 .

It is a cyclic number.

It is not a de Polignac number, because 305172113 - 2⁸ = 305171857 is a prime.

It is not a weakly prime, because it can be changed into another prime (305172163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152586056 + 152586057.

It is an arithmetic number, because the mean of its divisors is an integer number (152586057).

Almost surely, 2^305172113 is an apocalyptic number.

It is an amenable number.

305172113 is a deficient number, since it is larger than the sum of its proper divisors (1).

305172113 is an equidigital number, since it uses as much as digits as its factorization.

305172113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 305172113 is about 17469.1760824602. The cubic root of 305172113 is about 673.2581430651.

The spelling of 305172113 in words is "three hundred five million, one hundred seventy-two thousand, one hundred thirteen".