97897647 has 4 divisors (see below), whose sum is σ = 130530200. Its totient is φ = 65265096.

The previous prime is 97897643. The next prime is 97897661. The reversal of 97897647 is 74679879.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 97897647 - 2² = 97897643 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 (97897643) 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 3 ways as a sum of consecutive naturals, for example, 16316272 + ... + 16316277.

It is an arithmetic number, because the mean of its divisors is an integer number (32632550).

Almost surely, 2^97897647 is an apocalyptic number.

97897647 is a deficient number, since it is larger than the sum of its proper divisors (32632553).

97897647 is a wasteful number, since it uses less digits than its factorization.

97897647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32632552.

The product of its digits is 5334336, while the sum is 57.

The square root of 97897647 is about 9894.3239789285. The cubic root of 97897647 is about 460.8830658162.

The spelling of 97897647 in words is "ninety-seven million, eight hundred ninety-seven thousand, six hundred forty-seven".