620774477 has 2 divisors, whose sum is σ = 620774478. Its totient is φ = 620774476.

The previous prime is 620774467. The next prime is 620774503. The reversal of 620774477 is 774477026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 620707396 + 67081 = 24914^2 + 259^2 .

It is a cyclic number.

It is not a de Polignac number, because 620774477 - 2⁸ = 620774221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620774467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310387238 + 310387239.

It is an arithmetic number, because the mean of its divisors is an integer number (310387239).

Almost surely, 2^620774477 is an apocalyptic number.

It is an amenable number.

620774477 is a deficient number, since it is larger than the sum of its proper divisors (1).

620774477 is an equidigital number, since it uses as much as digits as its factorization.

620774477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 460992, while the sum is 44.

The square root of 620774477 is about 24915.3462147328. The cubic root of 620774477 is about 853.0568032844.

The spelling of 620774477 in words is "six hundred twenty million, seven hundred seventy-four thousand, four hundred seventy-seven".