97967445557 has 4 divisors (see below), whose sum is σ = 99815887980. Its totient is φ = 96119003136.

The previous prime is 97967445547. The next prime is 97967445577. The reversal of 97967445557 is 75554476979.

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 54599799556 + 43367646001 = 233666^2 + 208249^2 .

It is a cyclic number.

It is not a de Polignac number, because 97967445557 - 2¹² = 97967441461 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 (97967445547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 924221132 + ... + 924221237.

It is an arithmetic number, because the mean of its divisors is an integer number (24953971995).

Almost surely, 2^97967445557 is an apocalyptic number.

It is an amenable number.

97967445557 is a deficient number, since it is larger than the sum of its proper divisors (1848442423).

97967445557 is a wasteful number, since it uses less digits than its factorization.

97967445557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848442422.

The product of its digits is 333396000, while the sum is 68.

The spelling of 97967445557 in words is "ninety-seven billion, nine hundred sixty-seven million, four hundred forty-five thousand, five hundred fifty-seven".