621427073 has 2 divisors, whose sum is σ = 621427074. Its totient is φ = 621427072.

The previous prime is 621427039. The next prime is 621427127. The reversal of 621427073 is 370724126.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 436684609 + 184742464 = 20897^2 + 13592^2 .

It is a cyclic number.

It is not a de Polignac number, because 621427073 - 2²⁰ = 620378497 is a prime.

It is not a weakly prime, because it can be changed into another prime (621427033) 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, 310713536 + 310713537.

It is an arithmetic number, because the mean of its divisors is an integer number (310713537).

Almost surely, 2^621427073 is an apocalyptic number.

It is an amenable number.

621427073 is a deficient number, since it is larger than the sum of its proper divisors (1).

621427073 is an equidigital number, since it uses as much as digits as its factorization.

621427073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 621427073 is about 24928.4390405817. The cubic root of 621427073 is about 853.3556270455.

The spelling of 621427073 in words is "six hundred twenty-one million, four hundred twenty-seven thousand, seventy-three".