381369 has 4 divisors (see below), whose sum is σ = 508496. Its totient is φ = 254244.

The previous prime is 381347. The next prime is 381371. The reversal of 381369 is 963183.

381369 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

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.

It is a de Polignac number, because none of the positive numbers 2^k-381369 is a prime.

It is a super-2 number, since 2×381369² = 290884628322, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

381369 is strictly pandigital in base 7.

381369 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (381319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63559 + ... + 63564.

It is an arithmetic number, because the mean of its divisors is an integer number (127124).

2³⁸¹³⁶⁹ is an apocalyptic number.

It is an amenable number.

381369 is a deficient number, since it is larger than the sum of its proper divisors (127127).

381369 is a wasteful number, since it uses less digits than its factorization.

381369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127126.

The product of its digits is 3888, while the sum is 30.

The square root of 381369 is about 617.5508076264. The cubic root of 381369 is about 72.5184416028.

The spelling of 381369 in words is "three hundred eighty-one thousand, three hundred sixty-nine".