620631211 has 2 divisors, whose sum is σ = 620631212. Its totient is φ = 620631210.

The previous prime is 620631173. The next prime is 620631269. The reversal of 620631211 is 112136026.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 620631211 - 2¹³ = 620623019 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (620634211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310315605 + 310315606.

It is an arithmetic number, because the mean of its divisors is an integer number (310315606).

Almost surely, 2^620631211 is an apocalyptic number.

620631211 is a deficient number, since it is larger than the sum of its proper divisors (1).

620631211 is an equidigital number, since it uses as much as digits as its factorization.

620631211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 620631211 is about 24912.4709934603. The cubic root of 620631211 is about 852.9911737397.

Adding to 620631211 its reverse (112136026), we get a palindrome (732767237).

The spelling of 620631211 in words is "six hundred twenty million, six hundred thirty-one thousand, two hundred eleven".