97878295589 has 6 divisors (see below), whose sum is σ = 101369793330. Its totient is φ = 94503181136.

The previous prime is 97878295517. The next prime is 97878295639. The reversal of 97878295589 is 98559287879.

It can be written as a sum of positive squares in 3 ways, for example, as 29158294564 + 68720001025 = 170758^2 + 262145^2 .

It is not a de Polignac number, because 97878295589 - 2²⁴ = 97861518373 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97878225589) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58190774 + ... + 58192455.

It is an arithmetic number, because the mean of its divisors is an integer number (16894965555).

Almost surely, 2^97878295589 is an apocalyptic number.

It is an amenable number.

97878295589 is a deficient number, since it is larger than the sum of its proper divisors (3491497741).

97878295589 is a wasteful number, since it uses less digits than its factorization.

97878295589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116383287 (or 116383258 counting only the distinct ones).

The product of its digits is 914457600, while the sum is 77.

The spelling of 97878295589 in words is "ninety-seven billion, eight hundred seventy-eight million, two hundred ninety-five thousand, five hundred eighty-nine".