97685221 has 4 divisors (see below), whose sum is σ = 97741792. Its totient is φ = 97628652.

The previous prime is 97685191. The next prime is 97685227. The reversal of 97685221 is 12258679.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97685221 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 (97685227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25611 + ... + 29176.

It is an arithmetic number, because the mean of its divisors is an integer number (24435448).

Almost surely, 2^97685221 is an apocalyptic number.

It is an amenable number.

97685221 is a deficient number, since it is larger than the sum of its proper divisors (56571).

97685221 is a wasteful number, since it uses less digits than its factorization.

97685221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56570.

The product of its digits is 60480, while the sum is 40.

The square root of 97685221 is about 9883.5834088654. The cubic root of 97685221 is about 460.5494709936.

The spelling of 97685221 in words is "ninety-seven million, six hundred eighty-five thousand, two hundred twenty-one".