621069859 has 2 divisors, whose sum is σ = 621069860. Its totient is φ = 621069858.

The previous prime is 621069811. The next prime is 621069881. The reversal of 621069859 is 958960126.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 621069859 - 2²⁷ = 486852131 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (621067859) 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, 310534929 + 310534930.

It is an arithmetic number, because the mean of its divisors is an integer number (310534930).

Almost surely, 2^621069859 is an apocalyptic number.

621069859 is a deficient number, since it is larger than the sum of its proper divisors (1).

621069859 is an equidigital number, since it uses as much as digits as its factorization.

621069859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 621069859 is about 24921.2732218882. The cubic root of 621069859 is about 853.1920846566.

The spelling of 621069859 in words is "six hundred twenty-one million, sixty-nine thousand, eight hundred fifty-nine".