381013 has 4 divisors (see below), whose sum is σ = 390348. Its totient is φ = 371680.

The previous prime is 381011. The next prime is 381019. The reversal of 381013 is 310183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310183 = 313 ⋅991.

It can be written as a sum of positive squares in 2 ways, for example, as 23409 + 357604 = 153^2 + 598^2 .

It is a cyclic number.

It is not a de Polignac number, because 381013 - 2¹ = 381011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381011) 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, 4606 + ... + 4687.

It is an arithmetic number, because the mean of its divisors is an integer number (97587).

2³⁸¹⁰¹³ is an apocalyptic number.

It is an amenable number.

381013 is a deficient number, since it is larger than the sum of its proper divisors (9335).

381013 is an equidigital number, since it uses as much as digits as its factorization.

381013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9334.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 381013 is about 617.2625049361. The cubic root of 381013 is about 72.4958697607.

Adding to 381013 its reverse (310183), we get a palindrome (691196).

The spelling of 381013 in words is "three hundred eighty-one thousand, thirteen".