620109239 has 2 divisors, whose sum is σ = 620109240. Its totient is φ = 620109238.

The previous prime is 620109209. The next prime is 620109271. The reversal of 620109239 is 932901026.

It is an a-pointer prime, because the next prime (620109271) can be obtained adding 620109239 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 620109239 - 2²⁸ = 351673783 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620109209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310054619 + 310054620.

It is an arithmetic number, because the mean of its divisors is an integer number (310054620).

Almost surely, 2^620109239 is an apocalyptic number.

620109239 is a deficient number, since it is larger than the sum of its proper divisors (1).

620109239 is an equidigital number, since it uses as much as digits as its factorization.

620109239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 620109239 is about 24901.9926712703. The cubic root of 620109239 is about 852.7519751199.

The spelling of 620109239 in words is "six hundred twenty million, one hundred nine thousand, two hundred thirty-nine".