381313 has 4 divisors (see below), whose sum is σ = 382720. Its totient is φ = 379908.

The previous prime is 381301. The next prime is 381319. The reversal of 381313 is 313183.

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: 313183 = 13 ⋅24091.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381313 is a prime.

It is a Duffinian number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153 + ... + 886.

It is an arithmetic number, because the mean of its divisors is an integer number (95680).

2³⁸¹³¹³ is an apocalyptic number.

It is an amenable number.

381313 is a deficient number, since it is larger than the sum of its proper divisors (1407).

381313 is a wasteful number, since it uses less digits than its factorization.

381313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406.

The product of its digits is 216, while the sum is 19.

The square root of 381313 is about 617.5054655629. The cubic root of 381313 is about 72.5148919072.

Adding to 381313 its reverse (313183), we get a palindrome (694496).

It can be divided in two parts, 38 and 1313, that multiplied together give a palindrome (49894).

The spelling of 381313 in words is "three hundred eighty-one thousand, three hundred thirteen".