620680289 has 2 divisors, whose sum is σ = 620680290. Its totient is φ = 620680288.

The previous prime is 620680279. The next prime is 620680321. The reversal of 620680289 is 982086026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 609843025 + 10837264 = 24695^2 + 3292^2 .

It is a cyclic number.

It is not a de Polignac number, because 620680289 - 2²⁰ = 619631713 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (620680219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310340144 + 310340145.

It is an arithmetic number, because the mean of its divisors is an integer number (310340145).

Almost surely, 2^620680289 is an apocalyptic number.

It is an amenable number.

620680289 is a deficient number, since it is larger than the sum of its proper divisors (1).

620680289 is an equidigital number, since it uses as much as digits as its factorization.

620680289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 620680289 is about 24913.4559826613. The cubic root of 620680289 is about 853.0136572998.

The spelling of 620680289 in words is "six hundred twenty million, six hundred eighty thousand, two hundred eighty-nine".