97322581 has 2 divisors, whose sum is σ = 97322582. Its totient is φ = 97322580.

The previous prime is 97322539. The next prime is 97322593. The reversal of 97322581 is 18522379.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97318225 + 4356 = 9865^2 + 66^2 .

It is a cyclic number.

It is not a de Polignac number, because 97322581 - 2¹³ = 97314389 is a prime.

It is a super-2 number, since 2×97322581² = 18943369545003122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 97322581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97329581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48661290 + 48661291.

It is an arithmetic number, because the mean of its divisors is an integer number (48661291).

Almost surely, 2^97322581 is an apocalyptic number.

It is an amenable number.

97322581 is a deficient number, since it is larger than the sum of its proper divisors (1).

97322581 is an equidigital number, since it uses as much as digits as its factorization.

97322581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 97322581 is about 9865.2207780668. The cubic root of 97322581 is about 459.9788600871.

It can be divided in two parts, 97322 and 581, that added together give a triangular number (97903 = T₄₄₂).

The spelling of 97322581 in words is "ninety-seven million, three hundred twenty-two thousand, five hundred eighty-one".