620928361 has 2 divisors, whose sum is σ = 620928362. Its totient is φ = 620928360.

The previous prime is 620928359. The next prime is 620928403. The reversal of 620928361 is 163829026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 543822400 + 77105961 = 23320^2 + 8781^2 .

It is a cyclic number.

It is not a de Polignac number, because 620928361 - 2¹ = 620928359 is a prime.

Together with 620928359, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 620928361.

It is not a weakly prime, because it can be changed into another prime (620928311) 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, 310464180 + 310464181.

It is an arithmetic number, because the mean of its divisors is an integer number (310464181).

Almost surely, 2^620928361 is an apocalyptic number.

It is an amenable number.

620928361 is a deficient number, since it is larger than the sum of its proper divisors (1).

620928361 is an equidigital number, since it uses as much as digits as its factorization.

620928361 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 37.

The square root of 620928361 is about 24918.4341602758. The cubic root of 620928361 is about 853.1272856429.

The spelling of 620928361 in words is "six hundred twenty million, nine hundred twenty-eight thousand, three hundred sixty-one".