340381 has 2 divisors, whose sum is σ = 340382. Its totient is φ = 340380.

The previous prime is 340369. The next prime is 340387. The reversal of 340381 is 183043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 285156 + 55225 = 534^2 + 235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340381 is a prime.

It is a super-2 number, since 2×340381² = 231718450322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340387) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170190 + 170191.

It is an arithmetic number, because the mean of its divisors is an integer number (170191).

2³⁴⁰³⁸¹ is an apocalyptic number.

It is an amenable number.

340381 is a deficient number, since it is larger than the sum of its proper divisors (1).

340381 is an equidigital number, since it uses as much as digits as its factorization.

340381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 340381 is about 583.4218028151. The cubic root of 340381 is about 69.8213813420.

The spelling of 340381 in words is "three hundred forty thousand, three hundred eighty-one".