381968969 has 2 divisors, whose sum is σ = 381968970. Its totient is φ = 381968968.

The previous prime is 381968963. The next prime is 381969017. The reversal of 381968969 is 969869183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220374025 + 161594944 = 14845^2 + 12712^2 .

It is a cyclic number.

It is not a de Polignac number, because 381968969 - 2¹⁶ = 381903433 is a prime.

It is a super-2 number, since 2×381968969² = 291800586557845922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (381968963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190984484 + 190984485.

It is an arithmetic number, because the mean of its divisors is an integer number (190984485).

Almost surely, 2^381968969 is an apocalyptic number.

It is an amenable number.

381968969 is a deficient number, since it is larger than the sum of its proper divisors (1).

381968969 is an equidigital number, since it uses as much as digits as its factorization.

381968969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5038848, while the sum is 59.

The square root of 381968969 is about 19544.0264275302. The cubic root of 381968969 is about 725.5645030371.

The spelling of 381968969 in words is "three hundred eighty-one million, nine hundred sixty-eight thousand, nine hundred sixty-nine".