97521617 has 2 divisors, whose sum is σ = 97521618. Its totient is φ = 97521616.

The previous prime is 97521607. The next prime is 97521637. The reversal of 97521617 is 71612579.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95961616 + 1560001 = 9796^2 + 1249^2 .

It is an emirp because it is prime and its reverse (71612579) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97521617 - 2¹⁶ = 97456081 is a prime.

It is not a weakly prime, because it can be changed into another prime (97521607) 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, 48760808 + 48760809.

It is an arithmetic number, because the mean of its divisors is an integer number (48760809).

Almost surely, 2^97521617 is an apocalyptic number.

It is an amenable number.

97521617 is a deficient number, since it is larger than the sum of its proper divisors (1).

97521617 is an equidigital number, since it uses as much as digits as its factorization.

97521617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26460, while the sum is 38.

The square root of 97521617 is about 9875.3033877446. The cubic root of 97521617 is about 460.2922166604.

The spelling of 97521617 in words is "ninety-seven million, five hundred twenty-one thousand, six hundred seventeen".