620634433 has 2 divisors, whose sum is σ = 620634434. Its totient is φ = 620634432.

The previous prime is 620634407. The next prime is 620634457. The reversal of 620634433 is 334436026.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 602800704 + 17833729 = 24552^2 + 4223^2 .

It is a cyclic number.

It is not a de Polignac number, because 620634433 - 2⁵ = 620634401 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 620634395 and 620634404.

It is not a weakly prime, because it can be changed into another prime (620634403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310317216 + 310317217.

It is an arithmetic number, because the mean of its divisors is an integer number (310317217).

Almost surely, 2^620634433 is an apocalyptic number.

It is an amenable number.

620634433 is a deficient number, since it is larger than the sum of its proper divisors (1).

620634433 is an equidigital number, since it uses as much as digits as its factorization.

620634433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 31.

The square root of 620634433 is about 24912.5356597838. The cubic root of 620634433 is about 852.9926498352.

The spelling of 620634433 in words is "six hundred twenty million, six hundred thirty-four thousand, four hundred thirty-three".