381662369 has 4 divisors (see below), whose sum is σ = 416358960. Its totient is φ = 346965780.

The previous prime is 381662357. The next prime is 381662383. The reversal of 381662369 is 963266183.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 963266183 = 11 ⋅87569653.

It is a cyclic number.

It is not a de Polignac number, because 381662369 - 2⁴ = 381662353 is a prime.

It is a super-2 number, since 2×381662369² = 291332327821384322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381662339) 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 in 3 ways as a sum of consecutive naturals, for example, 17348279 + ... + 17348300.

It is an arithmetic number, because the mean of its divisors is an integer number (104089740).

Almost surely, 2^381662369 is an apocalyptic number.

It is an amenable number.

381662369 is a deficient number, since it is larger than the sum of its proper divisors (34696591).

381662369 is a wasteful number, since it uses less digits than its factorization.

381662369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34696590.

The product of its digits is 279936, while the sum is 44.

The square root of 381662369 is about 19536.1810239361. The cubic root of 381662369 is about 725.3703183063.

The spelling of 381662369 in words is "three hundred eighty-one million, six hundred sixty-two thousand, three hundred sixty-nine".