655243013 has 2 divisors, whose sum is σ = 655243014. Its totient is φ = 655243012.

The previous prime is 655242989. The next prime is 655243031. The reversal of 655243013 is 310342556.

Together with next prime (655243031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 652138369 + 3104644 = 25537^2 + 1762^2 .

It is a cyclic number.

It is not a de Polignac number, because 655243013 - 2²⁸ = 386807557 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655243033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327621506 + 327621507.

It is an arithmetic number, because the mean of its divisors is an integer number (327621507).

Almost surely, 2^655243013 is an apocalyptic number.

It is an amenable number.

655243013 is a deficient number, since it is larger than the sum of its proper divisors (1).

655243013 is an equidigital number, since it uses as much as digits as its factorization.

655243013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 655243013 is about 25597.7149956788. The cubic root of 655243013 is about 868.5619494082.

Adding to 655243013 its reverse (310342556), we get a palindrome (965585569).

The spelling of 655243013 in words is "six hundred fifty-five million, two hundred forty-three thousand, thirteen".