381077569 has 2 divisors, whose sum is σ = 381077570. Its totient is φ = 381077568.

The previous prime is 381077563. The next prime is 381077621. The reversal of 381077569 is 965770183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 358609969 + 22467600 = 18937^2 + 4740^2 .

It is a cyclic number.

It is not a de Polignac number, because 381077569 - 2¹¹ = 381075521 is a prime.

It is a super-2 number, since 2×381077569² = 290440227189899522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (381077563) 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, 190538784 + 190538785.

It is an arithmetic number, because the mean of its divisors is an integer number (190538785).

Almost surely, 2^381077569 is an apocalyptic number.

It is an amenable number.

381077569 is a deficient number, since it is larger than the sum of its proper divisors (1).

381077569 is an equidigital number, since it uses as much as digits as its factorization.

381077569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 46.

The square root of 381077569 is about 19521.2081849459. The cubic root of 381077569 is about 724.9996474037. Note that the first 3 decimals are identical.

The spelling of 381077569 in words is "three hundred eighty-one million, seventy-seven thousand, five hundred sixty-nine".