620631133 has 2 divisors, whose sum is σ = 620631134. Its totient is φ = 620631132.

The previous prime is 620631101. The next prime is 620631161. The reversal of 620631133 is 331136026.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 620358649 + 272484 = 24907^2 + 522^2 .

It is a cyclic number.

It is not a de Polignac number, because 620631133 - 2⁵ = 620631101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 620631098 and 620631107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620631173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310315566 + 310315567.

It is an arithmetic number, because the mean of its divisors is an integer number (310315567).

Almost surely, 2^620631133 is an apocalyptic number.

It is an amenable number.

620631133 is a deficient number, since it is larger than the sum of its proper divisors (1).

620631133 is an equidigital number, since it uses as much as digits as its factorization.

620631133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 620631133 is about 24912.4694279792. The cubic root of 620631133 is about 852.9911380055.

Adding to 620631133 its reverse (331136026), we get a palindrome (951767159).

The spelling of 620631133 in words is "six hundred twenty million, six hundred thirty-one thousand, one hundred thirty-three".