620780201 has 2 divisors, whose sum is σ = 620780202. Its totient is φ = 620780200.

The previous prime is 620780131. The next prime is 620780219. The reversal of 620780201 is 102087026.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 432432025 + 188348176 = 20795^2 + 13724^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620780201 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (620780231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310390100 + 310390101.

It is an arithmetic number, because the mean of its divisors is an integer number (310390101).

Almost surely, 2^620780201 is an apocalyptic number.

It is an amenable number.

620780201 is a deficient number, since it is larger than the sum of its proper divisors (1).

620780201 is an equidigital number, since it uses as much as digits as its factorization.

620780201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 620780201 is about 24915.4610834317. The cubic root of 620780201 is about 853.0594252147.

The spelling of 620780201 in words is "six hundred twenty million, seven hundred eighty thousand, two hundred one".