655945193 has 4 divisors (see below), whose sum is σ = 659241600. Its totient is φ = 652648788.

The previous prime is 655945181. The next prime is 655945217. The reversal of 655945193 is 391549556.

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 655945193 - 2¹⁴ = 655928809 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 (655945093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1647905 + ... + 1648302.

It is an arithmetic number, because the mean of its divisors is an integer number (164810400).

Almost surely, 2^655945193 is an apocalyptic number.

It is an amenable number.

655945193 is a deficient number, since it is larger than the sum of its proper divisors (3296407).

655945193 is a wasteful number, since it uses less digits than its factorization.

655945193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3296406.

The product of its digits is 729000, while the sum is 47.

The square root of 655945193 is about 25611.4270004621. The cubic root of 655945193 is about 868.8720985126.

The spelling of 655945193 in words is "six hundred fifty-five million, nine hundred forty-five thousand, one hundred ninety-three".