305672849 has 2 divisors, whose sum is σ = 305672850. Its totient is φ = 305672848.

The previous prime is 305672837. The next prime is 305672863. The reversal of 305672849 is 948276503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 243578449 + 62094400 = 15607^2 + 7880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-305672849 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (305672879) 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, 152836424 + 152836425.

It is an arithmetic number, because the mean of its divisors is an integer number (152836425).

Almost surely, 2^305672849 is an apocalyptic number.

It is an amenable number.

305672849 is a deficient number, since it is larger than the sum of its proper divisors (1).

305672849 is an equidigital number, since it uses as much as digits as its factorization.

305672849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 305672849 is about 17483.5021949265. The cubic root of 305672849 is about 673.6261762229.

The spelling of 305672849 in words is "three hundred five million, six hundred seventy-two thousand, eight hundred forty-nine".