627892009421 has 2 divisors, whose sum is σ = 627892009422. Its totient is φ = 627892009420.

The previous prime is 627892009399. The next prime is 627892009453. The reversal of 627892009421 is 124900298726.

627892009421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 627588762025 + 303247396 = 792205^2 + 17414^2 .

It is a cyclic number.

It is not a de Polignac number, because 627892009421 - 2³⁰ = 626818267597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 627892009421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (627892009721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313946004710 + 313946004711.

It is an arithmetic number, because the mean of its divisors is an integer number (313946004711).

Almost surely, 2^627892009421 is an apocalyptic number.

It is an amenable number.

627892009421 is a deficient number, since it is larger than the sum of its proper divisors (1).

627892009421 is an equidigital number, since it uses as much as digits as its factorization.

627892009421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 627892009421 in words is "six hundred twenty-seven billion, eight hundred ninety-two million, nine thousand, four hundred twenty-one".