97161917 has 2 divisors, whose sum is σ = 97161918. Its totient is φ = 97161916.

The previous prime is 97161887. The next prime is 97161941. The reversal of 97161917 is 71916179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97042201 + 119716 = 9851^2 + 346^2 .

It is an emirp because it is prime and its reverse (71916179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97161917 - 2¹⁰ = 97160893 is a prime.

It is a super-2 number, since 2×97161917² = 18880876230229778, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97161947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48580958 + 48580959.

It is an arithmetic number, because the mean of its divisors is an integer number (48580959).

Almost surely, 2^97161917 is an apocalyptic number.

It is an amenable number.

97161917 is a deficient number, since it is larger than the sum of its proper divisors (1).

97161917 is an equidigital number, since it uses as much as digits as its factorization.

97161917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23814, while the sum is 41.

The square root of 97161917 is about 9857.0744645660. The cubic root of 97161917 is about 459.7256035219.

The spelling of 97161917 in words is "ninety-seven million, one hundred sixty-one thousand, nine hundred seventeen".