620356189 has 2 divisors, whose sum is σ = 620356190. Its totient is φ = 620356188.

The previous prime is 620356151. The next prime is 620356211. The reversal of 620356189 is 981653026.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 576240025 + 44116164 = 24005^2 + 6642^2 .

It is a cyclic number.

It is not a de Polignac number, because 620356189 - 2²⁹ = 83485277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620356589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310178094 + 310178095.

It is an arithmetic number, because the mean of its divisors is an integer number (310178095).

Almost surely, 2^620356189 is an apocalyptic number.

It is an amenable number.

620356189 is a deficient number, since it is larger than the sum of its proper divisors (1).

620356189 is an equidigital number, since it uses as much as digits as its factorization.

620356189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 620356189 is about 24906.9506162437. The cubic root of 620356189 is about 852.8651590229.

The spelling of 620356189 in words is "six hundred twenty million, three hundred fifty-six thousand, one hundred eighty-nine".