620680121 has 4 divisors (see below), whose sum is σ = 621566244. Its totient is φ = 619794000.

The previous prime is 620680111. The next prime is 620680129. The reversal of 620680121 is 121086026.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 396010000 + 224670121 = 19900^2 + 14989^2 .

It is a cyclic number.

It is not a de Polignac number, because 620680121 - 2¹⁰ = 620679097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (620680129) 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 in 3 ways as a sum of consecutive naturals, for example, 442010 + ... + 443411.

It is an arithmetic number, because the mean of its divisors is an integer number (155391561).

Almost surely, 2^620680121 is an apocalyptic number.

It is an amenable number.

620680121 is a deficient number, since it is larger than the sum of its proper divisors (886123).

620680121 is an equidigital number, since it uses as much as digits as its factorization.

620680121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886122.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 620680121 is about 24913.4526109891. The cubic root of 620680121 is about 853.0135803378.

The spelling of 620680121 in words is "six hundred twenty million, six hundred eighty thousand, one hundred twenty-one".