97192781908 has 6 divisors (see below), whose sum is σ = 170087368346. Its totient is φ = 48596390952.

The previous prime is 97192781893. The next prime is 97192781927. The reversal of 97192781908 is 80918729179.

It can be written as a sum of positive squares in only one way, i.e., 94262508484 + 2930273424 = 307022^2 + 54132^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12149097735 + ... + 12149097742.

Almost surely, 2^97192781908 is an apocalyptic number.

It is an amenable number.

97192781908 is a deficient number, since it is larger than the sum of its proper divisors (72894586438).

97192781908 is a wasteful number, since it uses less digits than its factorization.

97192781908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24298195481 (or 24298195479 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 61.

The spelling of 97192781908 in words is "ninety-seven billion, one hundred ninety-two million, seven hundred eighty-one thousand, nine hundred eight".