380857049 has 2 divisors, whose sum is σ = 380857050. Its totient is φ = 380857048.

The previous prime is 380857019. The next prime is 380857051. The reversal of 380857049 is 940758083.

380857049 is nontrivially palindromic in base 9.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 303979225 + 76877824 = 17435^2 + 8768^2 .

It is an emirp because it is prime and its reverse (940758083) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-380857049 is a prime.

It is a Sophie Germain prime.

Together with 380857051, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (380857019) 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, 190428524 + 190428525.

It is an arithmetic number, because the mean of its divisors is an integer number (190428525).

Almost surely, 2^380857049 is an apocalyptic number.

It is an amenable number.

380857049 is a deficient number, since it is larger than the sum of its proper divisors (1).

380857049 is an equidigital number, since it uses as much as digits as its factorization.

380857049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 380857049 is about 19515.5591516103. The cubic root of 380857049 is about 724.8597740690.

The spelling of 380857049 in words is "three hundred eighty million, eight hundred fifty-seven thousand, forty-nine".