655002197 has 8 divisors (see below), whose sum is σ = 693797400. Its totient is φ = 616236544.

The previous prime is 655002191. The next prime is 655002217. The reversal of 655002197 is 791200556.

It can be written as a sum of positive squares in 4 ways, for example, as 392594596 + 262407601 = 19814^2 + 16199^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 655002197 - 2⁶ = 655002133 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 (655002191) 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 7 ways as a sum of consecutive naturals, for example, 51929 + ... + 63297.

It is an arithmetic number, because the mean of its divisors is an integer number (86724675).

Almost surely, 2^655002197 is an apocalyptic number.

It is an amenable number.

655002197 is a deficient number, since it is larger than the sum of its proper divisors (38795203).

655002197 is a wasteful number, since it uses less digits than its factorization.

655002197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14775.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 655002197 is about 25593.0107060502. The cubic root of 655002197 is about 868.4555312603.

The spelling of 655002197 in words is "six hundred fifty-five million, two thousand, one hundred ninety-seven".