655336393 has 2 divisors, whose sum is σ = 655336394. Its totient is φ = 655336392.

The previous prime is 655336337. The next prime is 655336421. The reversal of 655336393 is 393633556.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 645769744 + 9566649 = 25412^2 + 3093^2 .

It is a cyclic number.

It is not a de Polignac number, because 655336393 - 2²⁹ = 118465481 is a prime.

It is a super-3 number, since 3×655336393³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (655336303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327668196 + 327668197.

It is an arithmetic number, because the mean of its divisors is an integer number (327668197).

Almost surely, 2^655336393 is an apocalyptic number.

It is an amenable number.

655336393 is a deficient number, since it is larger than the sum of its proper divisors (1).

655336393 is an equidigital number, since it uses as much as digits as its factorization.

655336393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 656100, while the sum is 43.

The square root of 655336393 is about 25599.5389216290. The cubic root of 655336393 is about 868.6032076186.

The spelling of 655336393 in words is "six hundred fifty-five million, three hundred thirty-six thousand, three hundred ninety-three".