97858161 has 6 divisors (see below), whose sum is σ = 141350690. Its totient is φ = 65238768.

The previous prime is 97858157. The next prime is 97858177. The reversal of 97858161 is 16185879.

97858161 is a `hidden beast` number, since 9 + 7 + 8 + 581 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 63107136 + 34751025 = 7944^2 + 5895^2 .

It is not a de Polignac number, because 97858161 - 2² = 97858157 is a prime.

It is a super-3 number, since 3×97858161³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97858121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5436556 + ... + 5436573.

Almost surely, 2^97858161 is an apocalyptic number.

It is an amenable number.

97858161 is a deficient number, since it is larger than the sum of its proper divisors (43492529).

97858161 is a wasteful number, since it uses less digits than its factorization.

97858161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10873135 (or 10873132 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 97858161 is about 9892.3283912333. The cubic root of 97858161 is about 460.8210933496.

The spelling of 97858161 in words is "ninety-seven million, eight hundred fifty-eight thousand, one hundred sixty-one".