380305949 has 2 divisors, whose sum is σ = 380305950. Its totient is φ = 380305948.

The previous prime is 380305931. The next prime is 380305979. The reversal of 380305949 is 949503083.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 375661924 + 4644025 = 19382^2 + 2155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-380305949 is a prime.

It is a super-2 number, since 2×380305949² = 289265229689581202, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (380305909) 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, 190152974 + 190152975.

It is an arithmetic number, because the mean of its divisors is an integer number (190152975).

Almost surely, 2^380305949 is an apocalyptic number.

It is an amenable number.

380305949 is a deficient number, since it is larger than the sum of its proper divisors (1).

380305949 is an equidigital number, since it uses as much as digits as its factorization.

380305949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 380305949 is about 19501.4345369770. The cubic root of 380305949 is about 724.5099813621.

The spelling of 380305949 in words is "three hundred eighty million, three hundred five thousand, nine hundred forty-nine".