620117129 has 2 divisors, whose sum is σ = 620117130. Its totient is φ = 620117128.

The previous prime is 620117089. The next prime is 620117137. The reversal of 620117129 is 921711026.

620117129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 390655225 + 229461904 = 19765^2 + 15148^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620117129 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (620117929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310058564 + 310058565.

It is an arithmetic number, because the mean of its divisors is an integer number (310058565).

Almost surely, 2^620117129 is an apocalyptic number.

It is an amenable number.

620117129 is a deficient number, since it is larger than the sum of its proper divisors (1).

620117129 is an equidigital number, since it uses as much as digits as its factorization.

620117129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 620117129 is about 24902.1510918234. The cubic root of 620117129 is about 852.7555917861.

The spelling of 620117129 in words is "six hundred twenty million, one hundred seventeen thousand, one hundred twenty-nine".