620509243 has 2 divisors, whose sum is σ = 620509244. Its totient is φ = 620509242.

The previous prime is 620509229. The next prime is 620509261. The reversal of 620509243 is 342905026.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 620509243 - 2⁹ = 620508731 is a prime.

It is not a weakly prime, because it can be changed into another prime (620509343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310254621 + 310254622.

It is an arithmetic number, because the mean of its divisors is an integer number (310254622).

Almost surely, 2^620509243 is an apocalyptic number.

620509243 is a deficient number, since it is larger than the sum of its proper divisors (1).

620509243 is an equidigital number, since it uses as much as digits as its factorization.

620509243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 620509243 is about 24910.0229425828. The cubic root of 620509243 is about 852.9352927583.

The spelling of 620509243 in words is "six hundred twenty million, five hundred nine thousand, two hundred forty-three".