97305661 has 2 divisors, whose sum is σ = 97305662. Its totient is φ = 97305660.

The previous prime is 97305623. The next prime is 97305673. The reversal of 97305661 is 16650379.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88003161 + 9302500 = 9381^2 + 3050^2 .

It is a cyclic number.

It is not a de Polignac number, because 97305661 - 2²³ = 88917053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97305661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97305601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48652830 + 48652831.

It is an arithmetic number, because the mean of its divisors is an integer number (48652831).

Almost surely, 2^97305661 is an apocalyptic number.

It is an amenable number.

97305661 is a deficient number, since it is larger than the sum of its proper divisors (1).

97305661 is an equidigital number, since it uses as much as digits as its factorization.

97305661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 97305661 is about 9864.3631826895. The cubic root of 97305661 is about 459.9522020279.

The spelling of 97305661 in words is "ninety-seven million, three hundred five thousand, six hundred sixty-one".