307381 has 2 divisors, whose sum is σ = 307382. Its totient is φ = 307380.

The previous prime is 307367. The next prime is 307397. The reversal of 307381 is 183703.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188356 + 119025 = 434^2 + 345^2 .

It is a cyclic number.

It is not a de Polignac number, because 307381 - 2⁷ = 307253 is a prime.

It is a super-2 number, since 2×307381² = 188966158322, which contains 22 as substring.

It is a Chen prime.

307381 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (307301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153690 + 153691.

It is an arithmetic number, because the mean of its divisors is an integer number (153691).

2³⁰⁷³⁸¹ is an apocalyptic number.

It is an amenable number.

307381 is a deficient number, since it is larger than the sum of its proper divisors (1).

307381 is an equidigital number, since it uses as much as digits as its factorization.

307381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 307381 is about 554.4195162510. The cubic root of 307381 is about 67.4878624724.

The spelling of 307381 in words is "three hundred seven thousand, three hundred eighty-one".