97997197 has 4 divisors (see below), whose sum is σ = 103761756. Its totient is φ = 92232640.

The previous prime is 97997189. The next prime is 97997243. The reversal of 97997197 is 79179979.

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 87067561 + 10929636 = 9331^2 + 3306^2 .

It is a cyclic number.

It is not a de Polignac number, because 97997197 - 2³ = 97997189 is a prime.

It is a super-3 number, since 3×97997197³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97997167) 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, 2882254 + ... + 2882287.

It is an arithmetic number, because the mean of its divisors is an integer number (25940439).

Almost surely, 2^97997197 is an apocalyptic number.

It is an amenable number.

97997197 is a deficient number, since it is larger than the sum of its proper divisors (5764559).

97997197 is a wasteful number, since it uses less digits than its factorization.

97997197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5764558.

The product of its digits is 2250423, while the sum is 58.

The square root of 97997197 is about 9899.3533627202. The cubic root of 97997197 is about 461.0392335677.

The spelling of 97997197 in words is "ninety-seven million, nine hundred ninety-seven thousand, one hundred ninety-seven".