381802669 has 2 divisors, whose sum is σ = 381802670. Its totient is φ = 381802668.

The previous prime is 381802657. The next prime is 381802703. The reversal of 381802669 is 966208183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 379665225 + 2137444 = 19485^2 + 1462^2 .

It is an emirp because it is prime and its reverse (966208183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381802669 - 2⁵ = 381802637 is a prime.

It is a super-2 number, since 2×381802669² = 291546556111047122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388802669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190901334 + 190901335.

It is an arithmetic number, because the mean of its divisors is an integer number (190901335).

Almost surely, 2^381802669 is an apocalyptic number.

It is an amenable number.

381802669 is a deficient number, since it is larger than the sum of its proper divisors (1).

381802669 is an equidigital number, since it uses as much as digits as its factorization.

381802669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 381802669 is about 19539.7714674456. The cubic root of 381802669 is about 725.4591900388.

The spelling of 381802669 in words is "three hundred eighty-one million, eight hundred two thousand, six hundred sixty-nine".