97216686 has 120 divisors (see below), whose sum is σ = 261037656. Its totient is φ = 26943840.

The previous prime is 97216667. The next prime is 97216697. The reversal of 97216686 is 68661279.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 293541 + ... + 293871.

Almost surely, 2^97216686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97216686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130518828).

97216686 is an abundant number, since it is smaller than the sum of its proper divisors (163820970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97216686 is a wasteful number, since it uses less digits than its factorization.

97216686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 380 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 97216686 is about 9859.8522301300. The cubic root of 97216686 is about 459.8119678879.

The spelling of 97216686 in words is "ninety-seven million, two hundred sixteen thousand, six hundred eighty-six".