97098181 has 4 divisors (see below), whose sum is σ = 97989100. Its totient is φ = 96207264.

The previous prime is 97098083. The next prime is 97098187. The reversal of 97098181 is 18189079.

97098181 is nontrivially palindromic in base 16.

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 61873956 + 35224225 = 7866^2 + 5935^2 .

It is a cyclic number.

It is not a de Polignac number, because 97098181 - 2⁹ = 97097669 is a prime.

It is a super-2 number, since 2×97098181² = 18856113507017522, which contains 22 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 (97098187) 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, 445296 + ... + 445513.

It is an arithmetic number, because the mean of its divisors is an integer number (24497275).

Almost surely, 2^97098181 is an apocalyptic number.

It is an amenable number.

97098181 is a deficient number, since it is larger than the sum of its proper divisors (890919).

97098181 is a wasteful number, since it uses less digits than its factorization.

97098181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890918.

The product of its (nonzero) digits is 36288, while the sum is 43.

The square root of 97098181 is about 9853.8409262581. The cubic root of 97098181 is about 459.6250583658.

It can be divided in two parts, 97098 and 181, that added together give a palindrome (97279).

The spelling of 97098181 in words is "ninety-seven million, ninety-eight thousand, one hundred eighty-one".