655161197 has 4 divisors (see below), whose sum is σ = 655663776. Its totient is φ = 654658620.

The previous prime is 655161179. The next prime is 655161217. The reversal of 655161197 is 791161556.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 655161197 - 2⁸ = 655160941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655161497) 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, 249329 + ... + 251942.

It is an arithmetic number, because the mean of its divisors is an integer number (163915944).

Almost surely, 2^655161197 is an apocalyptic number.

It is an amenable number.

655161197 is a deficient number, since it is larger than the sum of its proper divisors (502579).

655161197 is a wasteful number, since it uses less digits than its factorization.

655161197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502578.

The product of its digits is 56700, while the sum is 41.

The square root of 655161197 is about 25596.1168343950. The cubic root of 655161197 is about 868.5257973135.

The spelling of 655161197 in words is "six hundred fifty-five million, one hundred sixty-one thousand, one hundred ninety-seven".