97647909897 has 16 divisors (see below), whose sum is σ = 132155535680. Its totient is φ = 64119667392.

The previous prime is 97647909893. The next prime is 97647909907. The reversal of 97647909897 is 79890974679.

It is not a de Polignac number, because 97647909897 - 2² = 97647909893 is a prime.

It is a super-2 number, since 2×97647909897² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97647909893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2170443 + ... + 2214975.

It is an arithmetic number, because the mean of its divisors is an integer number (8259720980).

Almost surely, 2^97647909897 is an apocalyptic number.

It is an amenable number.

97647909897 is a deficient number, since it is larger than the sum of its proper divisors (34507625783).

97647909897 is a wasteful number, since it uses less digits than its factorization.

97647909897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55512.

The product of its (nonzero) digits is 432081216, while the sum is 75.

The spelling of 97647909897 in words is "ninety-seven billion, six hundred forty-seven million, nine hundred nine thousand, eight hundred ninety-seven".