97708081 has 2 divisors, whose sum is σ = 97708082. Its totient is φ = 97708080.

The previous prime is 97708067. The next prime is 97708103. The reversal of 97708081 is 18080779.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49280400 + 48427681 = 7020^2 + 6959^2 .

It is an emirp because it is prime and its reverse (18080779) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97708081 - 2²¹ = 95610929 is a prime.

It is a super-2 number, since 2×97708081² = 19093738185405122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (97708381) 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, 48854040 + 48854041.

It is an arithmetic number, because the mean of its divisors is an integer number (48854041).

Almost surely, 2^97708081 is an apocalyptic number.

It is an amenable number.

97708081 is a deficient number, since it is larger than the sum of its proper divisors (1).

97708081 is an equidigital number, since it uses as much as digits as its factorization.

97708081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 97708081 is about 9884.7398043651. The cubic root of 97708081 is about 460.5853936564.

The spelling of 97708081 in words is "ninety-seven million, seven hundred eight thousand, eighty-one".