97501605997 has 2 divisors, whose sum is σ = 97501605998. Its totient is φ = 97501605996.

The previous prime is 97501605989. The next prime is 97501606009. The reversal of 97501605997 is 79950610579.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87761692516 + 9739913481 = 296246^2 + 98691^2 .

It is a cyclic number.

It is not a de Polignac number, because 97501605997 - 2³ = 97501605989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97501605917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48750802998 + 48750802999.

It is an arithmetic number, because the mean of its divisors is an integer number (48750802999).

Almost surely, 2^97501605997 is an apocalyptic number.

It is an amenable number.

97501605997 is a deficient number, since it is larger than the sum of its proper divisors (1).

97501605997 is an equidigital number, since it uses as much as digits as its factorization.

97501605997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5358150, while the sum is 58.

The spelling of 97501605997 in words is "ninety-seven billion, five hundred one million, six hundred five thousand, nine hundred ninety-seven".