620620633 has 2 divisors, whose sum is σ = 620620634. Its totient is φ = 620620632.

The previous prime is 620620607. The next prime is 620620657. The reversal of 620620633 is 336026026.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 595750464 + 24870169 = 24408^2 + 4987^2 .

It is a cyclic number.

It is not a de Polignac number, because 620620633 - 2²⁵ = 587066201 is a prime.

It is a super-4 number, since 4×620620633⁴ (a number of 36 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (620620673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310310316 + 310310317.

It is an arithmetic number, because the mean of its divisors is an integer number (310310317).

Almost surely, 2^620620633 is an apocalyptic number.

It is an amenable number.

620620633 is a deficient number, since it is larger than the sum of its proper divisors (1).

620620633 is an equidigital number, since it uses as much as digits as its factorization.

620620633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 620620633 is about 24912.2586892477. The cubic root of 620620633 is about 852.9863276025.

Adding to 620620633 its reverse (336026026), we get a palindrome (956646659).

The spelling of 620620633 in words is "six hundred twenty million, six hundred twenty thousand, six hundred thirty-three".