97661169 has 6 divisors (see below), whose sum is σ = 141066146. Its totient is φ = 65107440.

The previous prime is 97661119. The next prime is 97661171. The reversal of 97661169 is 96116679.

It can be written as a sum of positive squares in only one way, i.e., 75898944 + 21762225 = 8712^2 + 4665^2 .

It is not a de Polignac number, because 97661169 - 2²⁴ = 80883953 is a prime.

It is a super-2 number, since 2×97661169² = 19075407860893122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (97661119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5425612 + ... + 5425629.

Almost surely, 2^97661169 is an apocalyptic number.

It is an amenable number.

97661169 is a deficient number, since it is larger than the sum of its proper divisors (43404977).

97661169 is a wasteful number, since it uses less digits than its factorization.

97661169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10851247 (or 10851244 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 97661169 is about 9882.3665687931. The cubic root of 97661169 is about 460.5116691473.

The spelling of 97661169 in words is "ninety-seven million, six hundred sixty-one thousand, one hundred sixty-nine".