2017381 has 4 divisors (see below), whose sum is σ = 2060352. Its totient is φ = 1974412.

The previous prime is 2017369. The next prime is 2017397. The reversal of 2017381 is 1837102.

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 cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2017381 is a prime.

It is a super-2 number, since 2×2017381² = 8139652198322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2017681) 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, 21415 + ... + 21508.

It is an arithmetic number, because the mean of its divisors is an integer number (515088).

2^2017381 is an apocalyptic number.

It is an amenable number.

2017381 is a deficient number, since it is larger than the sum of its proper divisors (42971).

2017381 is an equidigital number, since it uses as much as digits as its factorization.

2017381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42970.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 2017381 is about 1420.3453805325. The cubic root of 2017381 is about 126.3560309134.

The spelling of 2017381 in words is "two million, seventeen thousand, three hundred eighty-one".