97165921 has 4 divisors (see below), whose sum is σ = 100516500. Its totient is φ = 93815344.

The previous prime is 97165919. The next prime is 97165927. The reversal of 97165921 is 12956179.

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 45037521 + 52128400 = 6711^2 + 7220^2 .

It is a cyclic number.

It is not a de Polignac number, because 97165921 - 2¹ = 97165919 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97165927) 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, 1675246 + ... + 1675303.

It is an arithmetic number, because the mean of its divisors is an integer number (25129125).

Almost surely, 2^97165921 is an apocalyptic number.

It is an amenable number.

97165921 is a deficient number, since it is larger than the sum of its proper divisors (3350579).

97165921 is a wasteful number, since it uses less digits than its factorization.

97165921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3350578.

The product of its digits is 34020, while the sum is 40.

The square root of 97165921 is about 9857.2775653321. The cubic root of 97165921 is about 459.7319184654.

The spelling of 97165921 in words is "ninety-seven million, one hundred sixty-five thousand, nine hundred twenty-one".