617655013 has 2 divisors, whose sum is σ = 617655014. Its totient is φ = 617655012.

The previous prime is 617655007. The next prime is 617655029. The reversal of 617655013 is 310556716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 590635809 + 27019204 = 24303^2 + 5198^2 .

It is a cyclic number.

It is not a de Polignac number, because 617655013 - 2²⁵ = 584100581 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 617655013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (617655613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308827506 + 308827507.

It is an arithmetic number, because the mean of its divisors is an integer number (308827507).

Almost surely, 2^617655013 is an apocalyptic number.

It is an amenable number.

617655013 is a deficient number, since it is larger than the sum of its proper divisors (1).

617655013 is an equidigital number, since it uses as much as digits as its factorization.

617655013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 617655013 is about 24852.6661145238. Note that the first 3 decimals coincide. The cubic root of 617655013 is about 851.6254998699.

The spelling of 617655013 in words is "six hundred seventeen million, six hundred fifty-five thousand, thirteen".