97213381 has 2 divisors, whose sum is σ = 97213382. Its totient is φ = 97213380.

The previous prime is 97213351. The next prime is 97213421. The reversal of 97213381 is 18331279.

97213381 is nontrivially palindromic in base 16.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76282756 + 20930625 = 8734^2 + 4575^2 .

It is an emirp because it is prime and its reverse (18331279) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97213381 - 2¹⁷ = 97082309 is a prime.

It is a super-2 number, since 2×97213381² = 18900882890902322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97213351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48606690 + 48606691.

It is an arithmetic number, because the mean of its divisors is an integer number (48606691).

Almost surely, 2^97213381 is an apocalyptic number.

It is an amenable number.

97213381 is a deficient number, since it is larger than the sum of its proper divisors (1).

97213381 is an equidigital number, since it uses as much as digits as its factorization.

97213381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 34.

The square root of 97213381 is about 9859.6846298449. The cubic root of 97213381 is about 459.8067572057.

The spelling of 97213381 in words is "ninety-seven million, two hundred thirteen thousand, three hundred eighty-one".