655057393 has 4 divisors (see below), whose sum is σ = 661810660. Its totient is φ = 648304128.

The previous prime is 655057321. The next prime is 655057441. The reversal of 655057393 is 393750556.

655057393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 302481664 + 352575729 = 17392^2 + 18777^2 .

It is a cyclic number.

It is not a de Polignac number, because 655057393 - 2¹³ = 655049201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655057303) 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, 3376488 + ... + 3376681.

It is an arithmetic number, because the mean of its divisors is an integer number (165452665).

Almost surely, 2^655057393 is an apocalyptic number.

It is an amenable number.

655057393 is a deficient number, since it is larger than the sum of its proper divisors (6753267).

655057393 is an equidigital number, since it uses as much as digits as its factorization.

655057393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6753266.

The product of its (nonzero) digits is 425250, while the sum is 43.

The square root of 655057393 is about 25594.0890246166. The cubic root of 655057393 is about 868.4799250335.

The spelling of 655057393 in words is "six hundred fifty-five million, fifty-seven thousand, three hundred ninety-three".