97740894917 has 2 divisors, whose sum is σ = 97740894918. Its totient is φ = 97740894916.

The previous prime is 97740894907. The next prime is 97740894929. The reversal of 97740894917 is 71949804779.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95200634116 + 2540260801 = 308546^2 + 50401^2 .

It is a cyclic number.

It is not a de Polignac number, because 97740894917 - 2¹⁰ = 97740893893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97740894907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48870447458 + 48870447459.

It is an arithmetic number, because the mean of its divisors is an integer number (48870447459).

Almost surely, 2^97740894917 is an apocalyptic number.

It is an amenable number.

97740894917 is a deficient number, since it is larger than the sum of its proper divisors (1).

97740894917 is an equidigital number, since it uses as much as digits as its factorization.

97740894917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32006016, while the sum is 65.

The spelling of 97740894917 in words is "ninety-seven billion, seven hundred forty million, eight hundred ninety-four thousand, nine hundred seventeen".