97653905917 has 2 divisors, whose sum is σ = 97653905918. Its totient is φ = 97653905916.

The previous prime is 97653905887. The next prime is 97653905927. The reversal of 97653905917 is 71950935679.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73804045561 + 23849860356 = 271669^2 + 154434^2 .

It is a cyclic number.

It is not a de Polignac number, because 97653905917 - 2¹⁹ = 97653381629 is a prime.

It is a super-2 number, since 2×97653905917² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97653905927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48826952958 + 48826952959.

It is an arithmetic number, because the mean of its divisors is an integer number (48826952959).

Almost surely, 2^97653905917 is an apocalyptic number.

It is an amenable number.

97653905917 is a deficient number, since it is larger than the sum of its proper divisors (1).

97653905917 is an equidigital number, since it uses as much as digits as its factorization.

97653905917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16074450, while the sum is 61.

The spelling of 97653905917 in words is "ninety-seven billion, six hundred fifty-three million, nine hundred five thousand, nine hundred seventeen".