627813421 has 2 divisors, whose sum is σ = 627813422. Its totient is φ = 627813420.

The previous prime is 627813419. The next prime is 627813463. The reversal of 627813421 is 124318726.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 599564196 + 28249225 = 24486^2 + 5315^2 .

It is a cyclic number.

It is not a de Polignac number, because 627813421 - 2¹ = 627813419 is a prime.

Together with 627813419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (627813401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313906710 + 313906711.

It is an arithmetic number, because the mean of its divisors is an integer number (313906711).

Almost surely, 2^627813421 is an apocalyptic number.

It is an amenable number.

627813421 is a deficient number, since it is larger than the sum of its proper divisors (1).

627813421 is an equidigital number, since it uses as much as digits as its factorization.

627813421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 627813421 is about 25056.2052394212. The cubic root of 627813421 is about 856.2689550850.

The spelling of 627813421 in words is "six hundred twenty-seven million, eight hundred thirteen thousand, four hundred twenty-one".