97381 has 2 divisors, whose sum is σ = 97382. Its totient is φ = 97380.

The previous prime is 97379. The next prime is 97387. The reversal of 97381 is 18379.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93025 + 4356 = 305^2 + 66^2 .

It is an emirp because it is prime and its reverse (18379) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97381 - 2¹ = 97379 is a prime.

It is a super-2 number, since 2×97381² = 18966118322, which contains 22 as substring.

Together with 97379, it forms a pair of twin primes.

97381 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48690 + 48691.

It is an arithmetic number, because the mean of its divisors is an integer number (48691).

2⁹⁷³⁸¹ is an apocalyptic number.

It is an amenable number.

97381 is a deficient number, since it is larger than the sum of its proper divisors (1).

97381 is an equidigital number, since it uses as much as digits as its factorization.

97381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 28.

The square root of 97381 is about 312.0592892384. The cubic root of 97381 is about 46.0070877547.

The spelling of 97381 in words is "ninety-seven thousand, three hundred eighty-one".