97880471813 has 16 divisors (see below), whose sum is σ = 100492269360. Its totient is φ = 95307964416.

The previous prime is 97880471779. The next prime is 97880471827. The reversal of 97880471813 is 31817408879.

It can be written as a sum of positive squares in 8 ways, for example, as 3891014884 + 93989456929 = 62378^2 + 306577^2 .

It is a cyclic number.

It is not a de Polignac number, because 97880471813 - 2¹⁴ = 97880455429 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 (97880471873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2879231 + ... + 2913027.

It is an arithmetic number, because the mean of its divisors is an integer number (6280766835).

Almost surely, 2^97880471813 is an apocalyptic number.

It is an amenable number.

97880471813 is a deficient number, since it is larger than the sum of its proper divisors (2611797547).

97880471813 is a wasteful number, since it uses less digits than its factorization.

97880471813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34376.

The product of its (nonzero) digits is 2709504, while the sum is 56.

The spelling of 97880471813 in words is "ninety-seven billion, eight hundred eighty million, four hundred seventy-one thousand, eight hundred thirteen".