620311 has 2 divisors, whose sum is σ = 620312. Its totient is φ = 620310.

The previous prime is 620303. The next prime is 620317. The reversal of 620311 is 113026.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 620311 - 2³ = 620303 is a prime.

620311 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 620291 and 620300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310155 + 310156.

It is an arithmetic number, because the mean of its divisors is an integer number (310156).

2⁶²⁰³¹¹ is an apocalyptic number.

620311 is a deficient number, since it is larger than the sum of its proper divisors (1).

620311 is an equidigital number, since it uses as much as digits as its factorization.

620311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 620311 is about 787.5982478396. The cubic root of 620311 is about 85.2844449921.

Adding to 620311 its reverse (113026), we get a palindrome (733337).

The spelling of 620311 in words is "six hundred twenty thousand, three hundred eleven".