655900193 has 4 divisors (see below), whose sum is σ = 706354068. Its totient is φ = 605446320.

The previous prime is 655900187. The next prime is 655900211. The reversal of 655900193 is 391009556.

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 416486464 + 239413729 = 20408^2 + 15473^2 .

It is a cyclic number.

It is not a de Polignac number, because 655900193 - 2¹⁰ = 655899169 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (655900123) 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 3 ways as a sum of consecutive naturals, for example, 25226918 + ... + 25226943.

It is an arithmetic number, because the mean of its divisors is an integer number (176588517).

Almost surely, 2^655900193 is an apocalyptic number.

It is an amenable number.

655900193 is a deficient number, since it is larger than the sum of its proper divisors (50453875).

655900193 is a wasteful number, since it uses less digits than its factorization.

655900193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50453874.

The product of its (nonzero) digits is 36450, while the sum is 38.

The square root of 655900193 is about 25610.5484712842. The cubic root of 655900193 is about 868.8522288960.

The spelling of 655900193 in words is "six hundred fifty-five million, nine hundred thousand, one hundred ninety-three".