620406427 has 2 divisors, whose sum is σ = 620406428. Its totient is φ = 620406426.

The previous prime is 620406421. The next prime is 620406431. The reversal of 620406427 is 724604026.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 620406427 - 2¹⁵ = 620373659 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (620406421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310203213 + 310203214.

It is an arithmetic number, because the mean of its divisors is an integer number (310203214).

Almost surely, 2^620406427 is an apocalyptic number.

620406427 is a deficient number, since it is larger than the sum of its proper divisors (1).

620406427 is an equidigital number, since it uses as much as digits as its factorization.

620406427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 620406427 is about 24907.9591094895. The cubic root of 620406427 is about 852.8881807880. Note that the first 3 decimals are identical.

The spelling of 620406427 in words is "six hundred twenty million, four hundred six thousand, four hundred twenty-seven".