97891165 has 4 divisors (see below), whose sum is σ = 117469404. Its totient is φ = 78312928.

The previous prime is 97891147. The next prime is 97891193. The reversal of 97891165 is 56119879.

It is a happy number.

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 16999129 + 80892036 = 4123^2 + 8994^2 .

It is a cyclic number.

It is not a de Polignac number, because 97891165 - 2¹¹ = 97889117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 9789112 + ... + 9789121.

It is an arithmetic number, because the mean of its divisors is an integer number (29367351).

Almost surely, 2^97891165 is an apocalyptic number.

It is an amenable number.

97891165 is a deficient number, since it is larger than the sum of its proper divisors (19578239).

97891165 is a wasteful number, since it uses less digits than its factorization.

97891165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19578238.

The product of its digits is 136080, while the sum is 46.

The square root of 97891165 is about 9893.9964119662. The cubic root of 97891165 is about 460.8728935937.

The spelling of 97891165 in words is "ninety-seven million, eight hundred ninety-one thousand, one hundred sixty-five".