620768101 has 2 divisors, whose sum is σ = 620768102. Its totient is φ = 620768100.

The previous prime is 620768077. The next prime is 620768111. The reversal of 620768101 is 101867026.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 430604001 + 190164100 = 20751^2 + 13790^2 .

It is a cyclic number.

It is not a de Polignac number, because 620768101 - 2⁵ = 620768069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620768111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310384050 + 310384051.

It is an arithmetic number, because the mean of its divisors is an integer number (310384051).

Almost surely, 2^620768101 is an apocalyptic number.

It is an amenable number.

620768101 is a deficient number, since it is larger than the sum of its proper divisors (1).

620768101 is an equidigital number, since it uses as much as digits as its factorization.

620768101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 620768101 is about 24915.2182611351. The cubic root of 620768101 is about 853.0538826807.

The spelling of 620768101 in words is "six hundred twenty million, seven hundred sixty-eight thousand, one hundred one".