97905707117 has 4 divisors (see below), whose sum is σ = 97918150620. Its totient is φ = 97893263616.

The previous prime is 97905707093. The next prime is 97905707147. The reversal of 97905707117 is 71170750979.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 869719081 + 97035988036 = 29491^2 + 311506^2 .

It is a cyclic number.

It is not a de Polignac number, because 97905707117 - 2²⁸ = 97637271661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97905707147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6209942 + ... + 6225687.

It is an arithmetic number, because the mean of its divisors is an integer number (24479537655).

Almost surely, 2^97905707117 is an apocalyptic number.

It is an amenable number.

97905707117 is a deficient number, since it is larger than the sum of its proper divisors (12443503).

97905707117 is a wasteful number, since it uses less digits than its factorization.

97905707117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12443502.

The product of its (nonzero) digits is 972405, while the sum is 53.

The spelling of 97905707117 in words is "ninety-seven billion, nine hundred five million, seven hundred seven thousand, one hundred seventeen".