97580921 has 2 divisors, whose sum is σ = 97580922. Its totient is φ = 97580920.

The previous prime is 97580891. The next prime is 97580929. The reversal of 97580921 is 12908579.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53875600 + 43705321 = 7340^2 + 6611^2 .

It is an emirp because it is prime and its reverse (12908579) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97580921 - 2¹⁰ = 97579897 is a prime.

It is a super-2 number, since 2×97580921² = 19044072286416482, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97580929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48790460 + 48790461.

It is an arithmetic number, because the mean of its divisors is an integer number (48790461).

Almost surely, 2^97580921 is an apocalyptic number.

It is an amenable number.

97580921 is a deficient number, since it is larger than the sum of its proper divisors (1).

97580921 is an equidigital number, since it uses as much as digits as its factorization.

97580921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 97580921 is about 9878.3055733258. The cubic root of 97580921 is about 460.3855007243.

The spelling of 97580921 in words is "ninety-seven million, five hundred eighty thousand, nine hundred twenty-one".