97640617 has 2 divisors, whose sum is σ = 97640618. Its totient is φ = 97640616.

The previous prime is 97640597. The next prime is 97640629. The reversal of 97640617 is 71604679.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93392896 + 4247721 = 9664^2 + 2061^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97640617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97640617.

It is not a weakly prime, because it can be changed into another prime (97640017) 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, 48820308 + 48820309.

It is an arithmetic number, because the mean of its divisors is an integer number (48820309).

Almost surely, 2^97640617 is an apocalyptic number.

It is an amenable number.

97640617 is a deficient number, since it is larger than the sum of its proper divisors (1).

97640617 is an equidigital number, since it uses as much as digits as its factorization.

97640617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 97640617 is about 9881.3266821819. The cubic root of 97640617 is about 460.4793632339.

The spelling of 97640617 in words is "ninety-seven million, six hundred forty thousand, six hundred seventeen".